20 Best Sous Vide Ziploc [2024]

Are you looking for the best Sous Vide Ziploc? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling Sous Vide Ziploc.

We Recommended:

# Preview Product
1 Ziploc Gallon Food Storage Freezer Bags, Grip 'n Seal Technology for Easier Grip, Open, and Close,... Ziploc Gallon Food Storage Freezer Bags, Grip 'n Seal Technology for Easier Grip, Open, and...
2 Ziploc Quart Food Storage Freezer Bags, Grip 'n Seal Technology for Easier Grip, Open, and Close, 75... Ziploc Quart Food Storage Freezer Bags, Grip 'n Seal Technology for Easier Grip, Open, and Close,...
3 Stasher Silicone Reusable Storage Bag, Bundle 4-Pack Small (Aqua) | Food Meal Prep Storage Container... Stasher Silicone Reusable Storage Bag, Bundle 4-Pack Small (Aqua) | Food Meal Prep Storage...
4 Sous Vide Bags, 42 PCS Electric Vacuum Sealer Food Vacuum Sealer & Reusable Vacuum Food Storage Bags... Sous Vide Bags, 42 PCS Electric Vacuum Sealer Food Vacuum Sealer & Reusable Vacuum Food Storage...
5 Anova Culinary AN400-US00 Nano Sous Vide Precision Cooker, 12.8' x 2.2' x 4.1', Silver Anova Culinary AN400-US00 Nano Sous Vide Precision Cooker, 12.8" x 2.2" x 4.1", Silver
6 HOMENOTE Sous Vide Container 12 Quart with Lid & Rack and Sleeve - BPA Free Complete Sous Vide... HOMENOTE Sous Vide Container 12 Quart with Lid & Rack and Sleeve - BPA Free Complete Sous Vide...
7 Anova Culinary Sous Vide Precision Cooker Pro, 1200 Watts, Black and Silver Anova Culinary Sous Vide Precision Cooker Pro, 1200 Watts, Black and Silver
8 Zonegrace Sous Vide Bags 45 Reusable Vacuum Food Storage Bags for Anova and Joule Cookers - 3 sizes... Zonegrace Sous Vide Bags 45 Reusable Vacuum Food Storage Bags for Anova and Joule Cookers - 3...
9 Yedi Infinity Sous Vide, Powered by Octcision Technology, Deluxe Accessory Kit, Recipes, 1000 Watts Yedi Infinity Sous Vide, Powered by Octcision Technology, Deluxe Accessory Kit, Recipes, 1000 Watts
10 Ziploc Gallon Food Storage Bags, Grip 'n Seal Technology for Easier Grip, Open, and Close, 75 Count,... Ziploc Gallon Food Storage Bags, Grip 'n Seal Technology for Easier Grip, Open, and Close, 75...
11 Sous Vide Bags 20pack Reusable Vacuum Food Storage Bags with 3 Sizes Vacuum Food Bags,1 Hand Pump,4... Sous Vide Bags 20pack Reusable Vacuum Food Storage Bags with 3 Sizes Vacuum Food Bags,1 Hand...
12 Sous Vide Bags 52 PCS - 30 Reusable Vacuum Food Sealer Bags for Anova, Joule Cookers - 3 Sizes Sous... Sous Vide Bags 52 PCS - 30 Reusable Vacuum Food Sealer Bags for Anova, Joule Cookers - 3 Sizes...
13 Sous Vide CookBook: 610 Simple Recipes And Meals For Breakfast, Lunch, Snacks And Dinner For... Sous Vide CookBook: 610 Simple Recipes And Meals For Breakfast, Lunch, Snacks And Dinner For...
14 Ziploc Vacuum Starter Kit, 3-Quart Bags, 1-Pump Ziploc Vacuum Starter Kit, 3-Quart Bags, 1-Pump
15 Sous Vide Lid for Precision Cooking - Fits Anova Culinary Sous Vide Precision Cooker and up to 10.5'... Sous Vide Lid for Precision Cooking - Fits Anova Culinary Sous Vide Precision Cooker and up to...
16 Inkbird Sous Vide Precision Cooker ISV-100W | 1000 Watts WIFI Sous-Vide Cooking Cooker Immersion... Inkbird Sous Vide Precision Cooker ISV-100W | 1000 Watts WIFI Sous-Vide Cooking Cooker Immersion...
17 Breville Joule Sous Vide, Stainless Steel, CS10001 Breville Joule Sous Vide, Stainless Steel, CS10001
18 Rubbermaid Commercial Products, Plastic Space Saving Square Food Storage Container for Kitchen/Sous... Rubbermaid Commercial Products, Plastic Space Saving Square Food Storage Container for...
19 EVERIE Sous Vide Container with Universal Silicone Lid and Sous Vide Rack and Container Sleeve... EVERIE Sous Vide Container with Universal Silicone Lid and Sous Vide Rack and Container Sleeve...
20 Anova Culinary ANTC01 Sous Vide Cooker Cooking container, Holds Up to 16L of Water, With Removable... Anova Culinary ANTC01 Sous Vide Cooker Cooking container, Holds Up to 16L of Water, With...
Bestseller No. 1
Ziploc Gallon Food Storage Freezer Bags, Grip 'n Seal Technology for Easier Grip, Open, and Close,...
  • Grip ‘n Seal technology and triple seal system featuring extended tab, easy-grip texture and double zipper for maximum ease of use
  • Designed to help protect from freezer burn
  • Perfect for storing fresh food items (e.g. meat or fish) in the fridge or freezer
  • Safe for use in the microwave (when used as directed), freezer and fridge
  • 28-gallon Ziploc bags made of durable BPA-free plastic
SaleBestseller No. 2
Ziploc Quart Food Storage Freezer Bags, Grip 'n Seal Technology for Easier Grip, Open, and Close, 75...
  • Grip Ԯ Seal technology and triple seal system featuring extended tab, easy-grip texture and double zipper for maximum ease of use
  • Designed to help protect from freezer burn
  • Perfect for storing fresh food items (e.g. meat or fish) in the fridge or freezer
  • Safe for use in the microwave (when used as directed), freezer and fridge
  • 75-quart Ziploc bags made of durable BPA-free plastic
SaleBestseller No. 3
Stasher Silicone Reusable Storage Bag, Bundle 4-Pack Small (Aqua) | Food Meal Prep Storage Container...
  • GO FROM LUNCH TO THE GYM: Waste-free storage for everything from snacks to sweats and sneakers, this assortment will take you through a busy day; BPA...
  • STORAGE FROM SOUP TO NUTS: Endless possibilities, organize the junk drawer, protect your cellphone & keys at the beach, pre-prep meals, freeze...
  • JUST THE STASH: Platinum food-grade silicone Stashers are dishwasher, microwave and oven safe to 400F; Eliminate single-use plastic by using Stasher...
  • EASY TO CARE FOR: Reusable silicone Stashers go from the freezer to the microwave to the oven & dishwasher; Store low-waste items, like reusable...
  • STASHER'S MISSION: Create a waste-free world through education, action, & advocacy; We pledge 1% of all sales each year to nonprofits protecting the...
SaleBestseller No. 4
Sous Vide Bags, 42 PCS Electric Vacuum Sealer Food Vacuum Sealer & Reusable Vacuum Food Storage Bags...
  • 【42 PCS Food Vacuum Sealer Set, Use for Home /Restaurant /SuperMarket】-- You will get 1*rechargeable electric vacuum pump, 10*Large reusable food...
  • 【Rechargeable Vacuum Sealer】-- Our Portable Mini electric vacuum sealer for dry foods and wet foods, One-touch switch button, easy to use and...
  • 【Keep Foods Fresher & Longer】-- Savesealer food vacuum kit 30 PCS 3 Sizes reinforced double zipper vacuum sealer bags creates an airtight barrier,...
  • 【Food Safe & BPA FREE Material】-- Reusable vacuum food storage bags are BPA free, high quality food safe material. Much better than normal freezer...
  • 【Multifunctional Use】-- Reusable vacuum sealer bags are safe for freezing, microwave, or cooking at higher temperatures,(sous vide cooking). 5 PCS...
SaleBestseller No. 5
Anova Culinary AN400-US00 Nano Sous Vide Precision Cooker, 12.8" x 2.2" x 4.1", Silver
  • Perfect results every time: Never over or under cook your food again. The Anova Precision Cooker Nano circulates water at the exact temperature...
  • What to cook: Sous vide (pronounced “sue-veed”) cooking offers the perfect level of doneness for chicken, fish, vegetables, eggs, beef, lamb,...
  • Small but mighty: The 12.8″ Anova Precision Cooker Nano stows away in any kitchen drawer next to the whisk and ladle, so your counters stay...
  • Customer experience: Designed in San Francisco, CA. Anova delivers thousands of sous vide recipes for free in the Anova app, created for cooks of...
SaleBestseller No. 6
HOMENOTE Sous Vide Container 12 Quart with Lid & Rack and Sleeve - BPA Free Complete Sous Vide...
  • [Complete sous vide essential accessories] 12 Qt container and lid with Pre-cut holes (middle mount), sous vide rack and sleeve that make up these...
  • [The most suitable container for sous vide] This container/lid is made from BPA free Polycarbonate, it’s resists heat very well which help keep even...
  • [Sturdy and adjustable sous vide rack] The wavy design of our rack is made of 304 stainless steel, hard to rust (Please keep it clean, especially the...
  • [Heat-resistant and insulated sous vide sleeve] This sous vide sleeve is made from high grade neoprene that precious heat from dissipating through the...
  • [Attention] This set of accessories has been tested perfectly for ANOVA and CHEFSTEPS machines, but we are not committed to that it is suitable for...
SaleBestseller No. 7
Anova Culinary Sous Vide Precision Cooker Pro, 1200 Watts, Black and Silver
  • Perfect results every time: Never over or undercook your food again. The Anova Precision Cooker Pro circulates water at the exact temperature required...
  • What to cook: Sous vide (pronounced “sue-veed”) cooking offers the perfect level of doneness for nearly any food. Chicken, fish, vegetables, eggs,...
  • Our most powerful sous vide cooker: The Anova Precision Cooker Pro was ruggedized to thrive in the most demanding of kitchens, able to heat up to 100L...
  • Easy to use: Simply attach the precision cooker to your own pot or container, fill the pot or container with water, add your food in a sealed bag, and...
  • Customer experience: designed in San Francisco, CA. Anova delivers thousands of sous vide recipes for free in the Anova app, created for cooks of...
Bestseller No. 8
Zonegrace Sous Vide Bags 45 Reusable Vacuum Food Storage Bags for Anova and Joule Cookers - 3 sizes...
  • ✅CONVENIENCE - The worlds fully functional, eco-friendly, vacuum-sealing sous vide kit. Zonegrace Bags require no vacuum sealer, no imperfect...
  • ✅BPA Free - sous vide vacuum bags made of BPA free plastic . It's safe for freezing, microwave or cooking at high temperatures and can keep vacuum...
  • ✅NO MORE FREEZER BURN - Now features reinforced double zipper bags for sous vide and food storage. The air-tight seal blocks out air and locks in...
  • ✅ALL IN ONE - Includes 45 reusable sous vide vacuum bags(3 Sizes 15bags/per Size: 8.7"x8.2", 10.2"x11.0", 10.2"x13.4"), 1 hand pump, 4 Sealing...
  • ✅USE WITH CONFIDENCE - Zonegrace is backed by 100% guarantee that you are fully satisfied with your product or receive your money back
Bestseller No. 9
Yedi Infinity Sous Vide, Powered by Octcision Technology, Deluxe Accessory Kit, Recipes, 1000 Watts
  • SOUS VIDE COOKER: Heats and circulates water at an exact temperature. Range of 77-203 degrees Fahrenheit, Up to 99Hours 59Minutes of cook time. Sous...
  • POWERED BY “OCTCISION” TECHNOLOGY: The Yedi “Infinity’s” patented octagonal shape creates a more even and accurate water and heat flow...
  • SOUS VIDE DELUXE ACCESSORY KIT: Included is 1 hand pump, 20 Reusable BPA Free Vacuum Sealed Bags, 4 sous vide container clips, 2 sous vide vacuum bag...
  • HEATS UP FAST: 1000 Watts of power for hyper-fast water heating. Designed to be Ultra-Quiet while acheiving Michelin restaurant level quality cooking...
  • RISK FREE SHOPPING: Within 2-years of your purchase Yedi Houseware will refund your money and or replace your purchase if you have any issues with it!
Bestseller No. 10
Ziploc Gallon Food Storage Bags, Grip 'n Seal Technology for Easier Grip, Open, and Close, 75 Count,...
  • Perfect for storing fresh food items like fruits, vegetables, meat, fish or cheese in the fridge or freezer
  • Triple seal system with extended tab, easy-grip texture and double zipper makes these Ziploc bags easy to use
  • Pack contains 150 reusable Ziploc bags made of durable and long-lasting BPA-free plastic
  • Pop-resistant seal on these plastic storage bags helps lock in the flavor of food items
  • Reusable, when used as directed
Bestseller No. 11
Sous Vide Bags 20pack Reusable Vacuum Food Storage Bags with 3 Sizes Vacuum Food Bags,1 Hand Pump,4...
  • Sous Vide Bags:Comes with small/medium/large sizes(8.2’’x8.7’’,10.2’’x11’’,10.2’’x13.4’’), 1 hand pump and 4 sealing clips....
  • Safety sous vide cooking bag kit: Made from food grade plastic which are safe for freezing, microwave, or cooking at higher temperatures. Great...
  • Easy to use and store: You just place your food items in the reusable food storage bag,seal the top with the clips provided,then attach the pump on...
  • Multipurpose: This sous vide bag can be used not only for food storage (meat,fish,vegetable,fruits,seafood,nuts or other solid and semi-solid food...
  • Guarrantee: Vaccum food bags keep your food fresh 5 times longer than other traditional storage methods. 24 hour online service available to resolve...
SaleBestseller No. 12
Sous Vide Bags 52 PCS - 30 Reusable Vacuum Food Sealer Bags for Anova, Joule Cookers - 3 Sizes Sous...
  • 100% LEAK PROOF & NON-TOXIC PE/PA: The first easy-to-use, eco-friendly, reusable freezer bag, & reusable sous vide bags kit. Plus unlike other bags,...
  • WHO DOESN'T LOVE CONVENIENCE?: Say good-bye to the hassle of a large unit vacuum sealer and the imperfect water displacement method
  • STORE IN BULK: Now features reinforced double zipper bags for sous vide & food storage which extends food life by 5x and virtually eliminates freezer...
  • EASY TO USE - Sous vide cookings bags are safe for freezing, microwave, marinade & sous vide at higher temperatures - suitable for all immersion...
  • THIS KIT CONTAINS: 10 of Sandwich size (8.7"x8.2"), 10 of Quart Size (11.0" x 10.2"), 10 of Gallon size (10.2"x13.4") (1.06 US GAL), 1 hand pump, 4...
Bestseller No. 13
Sous Vide CookBook: 610 Simple Recipes And Meals For Breakfast, Lunch, Snacks And Dinner For...
  • Nicholls, Ashley (Author)
  • English (Publication Language)
  • 341 Pages - 09/04/2021 (Publication Date) - Independently published (Publisher)
SaleBestseller No. 14
Ziploc Vacuum Starter Kit, 3-Quart Bags, 1-Pump
  • Includes specially designed vacuum bags and a simple, battery free, air removal pump
  • Bags have a special one way valve that allows air in the bags to be removed
  • Great for freezing steak, hamburger, chicken and more
  • Ensures and maintains a tight vacuum seal
  • Microwave safe when used as directed
Bestseller No. 15
Sous Vide Lid for Precision Cooking - Fits Anova Culinary Sous Vide Precision Cooker and up to 10.5"...
  • Cook Like a French Chef — The sous vide cooking style is a brilliant French method using precision controlled temperatures to thoroughly and evenly...
  • Enjoy Perfectly Cooked Meats and Vegetables — The biggest benefit of this French cooking style is the sous vide extreme flavor-packed results. Sous...
  • No Hassle Cooking — No more running back and forth checking water levels during your cooking! The lid for sous vide pot cookers holds in steam and...
  • Shorten Heating Times — Using sous vide lids allows you to pre-heat quicker and shorten overall heating times during your cooking. The lid increases...
  • Pair With Most Sous Vide Cookers and Pots — The Impresa silicone lid compatible with Anova Sous Vide Circulator and other brands fits most pots. The...
Bestseller No. 16
Inkbird Sous Vide Precision Cooker ISV-100W | 1000 Watts WIFI Sous-Vide Cooking Cooker Immersion...
  • ★ 【2.4GHZ Wifi Remote Control】The WIFI sous vide cooker ONLY support 2.4Ghz WIFI, but once was connected with your router via APP INKBIRD, it...
  • ★ 【Powerful Yet Quiet Cooker】 This sous vide precision cooker keeps a homogeneous temperature for up to 20 L of water even at full 1000 W...
  • ★ 【Precision Cooker & Intelligent Design】 Our sous vide cooker features a wide temperature range of 77-210°F (25-99°C) within 0.1°C accuracy...
  • ★ 【Cook Like a Chef at Home】 Achieves restaurant quality meals with ease by preserving juices, moisture and flavors thanks to precise...
  • ★ 【Reliable Cooking Partner】Additional calibration function is added to Inkbird Precise Cooker, which can keep a more accurate temperature at...
Bestseller No. 17
Breville Joule Sous Vide, Stainless Steel, CS10001
  • Smallest, sleekest sous vide tool available at just 11 inches tall and 1.3 pounds, with streamlined white body and solid stainless steel cap & base.
  • Saves space: Half the size of other sous vide machines, it's small enough to slip into a top drawer. IEEE 802.11 b/g/n Wi-Fi compatible 2.4 Ghz only
  • Heats up fast: 1100 watts of power for hyper-fast water heating. System requirements: iOS 8.0 or later, Android 4.4 or later, internet access required...
  • Perfect results: Visual Doneness feature in the Joule app displays exactly how food cooks. Dinner comes out predictably perfect, every time. Vessel...
  • Wifi and bluetooth ready: Works with iPhone or Android. Connect with Bluetooth alone, or cook from anywhere with Wi-Fi. Bluetooth smart 4.0 wireless...
Bestseller No. 18
Rubbermaid Commercial Products, Plastic Space Saving Square Food Storage Container for Kitchen/Sous...
  • QUALITY ENGINEERING: Its commercial grade, break-resistant, polycarbonate material allows for greater durability, product visibility, and a smooth...
  • DESIGNED FOR SAVING SPACE: Square containers store up to 25% more on a shelf than round containers, providing compact storage for your busy kitchen
  • TEMPERATURE RANGE: Made of FDA compliant materials, this food storage container is dishwasher safe and able to withstand temperatures from -40 to 212...
  • IDEAL FOR SOUS VIDE: The high heat threshold and strong innovative design has made this the sous vide immersion cooking container on
  • PERFECT SIZE FOR: Onions, broccoli, sweet potatoes, avocados, apples, oranges
Bestseller No. 19
EVERIE Sous Vide Container with Universal Silicone Lid and Sous Vide Rack and Container Sleeve...
  • Sous Vide Container Bundle - A must have bundle of 12 quart sous vide container and a universal silicone lid and stainless steel rack and a container...
  • Container is made of polycarbonate, NSF approved for your sous vide cooking safety. Silicone lid is collasible making it easy to refill or remove...
  • Sous vide cooker is mounted at the side near the corner to optimize the water flow within the water tank. Corner mount lid is the most bought.
  • Sous Vide Rack - Stainless steel rack keeps your food filled bags in the water bath for complete heating. Wobble-Free rack's dividers are mounted to...
  • Sous Vide Container Sleeve - Neoprene material made sleeve decreases the heat exchange and heat loss by insulation.
Bestseller No. 20
Anova Culinary ANTC01 Sous Vide Cooker Cooking container, Holds Up to 16L of Water, With Removable...
  • PURPOSE BUILT FOR SOUS VIDE: Combining a curved body shape that encourages superior water circulation with a silicon sealed lid, an integrated wire...
  • USE WITH ANY SOUS VIDE: The flexible silicon lid collar allows for the use of nearly any "wand" style sous vide circulator in the Anova Precision...
  • PUT A LID ON IT: Constructed of food-grade polycarbonate and utilizing a silicon sealed lid ensures no steam escapes your cook while maintaining...
  • EASY TO USE: Simply fill your Anova Precision Cooker Container with water, attach your sous vide circulator to the container, place or clip your...
  • Included Components: Container, Lid And Rack

Having trouble finding a great Sous Vide Ziploc?

This problem is well understood by us because we have gone through the entire Sous Vide Ziploc research process ourselves, which is why we have put together a comprehensive list of the best Sous Vide Ziplocs available in the market today.

After hours of searching and using all the models on the market, we have found the best Sous Vide Ziploc for 2023. See our ranking below!

How Do You Buy The Best Sous Vide Ziploc?

Do you get stressed out thinking about shopping for a great Sous Vide Ziploc? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching Sous Vide Ziploc, which is why we have assembled a comprehensive list of the greatest Sous Vide Ziploc available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Sous Vide Ziploc that you consider buying. Your questions might include the following:

  • Is it worth buying an Sous Vide Ziploc?
  • What benefits are there with buying an Sous Vide Ziploc?
  • What factors deserve consideration when shopping for an effective Sous Vide Ziploc?
  • Why is it crucial to invest in any Sous Vide Ziploc, much less the best one?
  • Which Sous Vide Ziploc are good in the current market?
  • Where can you find information like this about Sous Vide Ziploc?

We’re convinced that you likely have far more questions than just these regarding Sous Vide Ziploc, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Sous Vide Ziploc, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Sous Vide Ziploc. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an Sous Vide Ziploc buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Sous Vide Ziploc currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of Sous Vide Ziploc has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Sous Vide Ziploc?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Sous Vide Ziploc.
  5. Customer Ratings: Number ratings grade Sous Vide Ziploc objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Sous Vide Ziploc.
  7. Product Quality: You don’t always get what you pay for with an Sous Vide Ziploc, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Sous Vide Ziploc is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining Sous Vide Ziploc information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding Sous Vide Ziploc is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

Related Post:

FAQ:

Q: Can you use Ziploc bags for sous vide?

A: As you get more serious, you may find that you want to use vacuum bags instead, but Ziplocs are a great starting point! Read on to learn all about how to use Ziploc bags for sous vide. We’ll cover their safety, some best practices, how to seal them, and alternatives you can use instead if you prefer. Are Ziploc Bags Safe for Sous Vide?

Q: What is the best sous vide starter bag?

A: Ziploc freezer bags and storage bags are a great sous vide starter bag for the sous vide cooking method. Both these bags will work, although I prefer the freezer bags because they are thicker. A thicker lining will allow the freezer bags to be more durable in a hot water bath.

Q: What can I use instead of a vacuum sealer for sous vide?

A: No need to splurge on a vacuum sealer — cheaper Ziploc bags and water work just fine. Food-safe zipper bags work great for sous vide. I’m known to go the cheap route whenever possible, so while learning to cook sous vide I used Ziploc bags instead of vacuum sealed bags.

Q: What is sous vide cooking?

A: Sous vide is characterized by low-temperature cooking, a longer period of cooking than conventional cooking. A container such as a plastic or Ziploc bag separates the food from its heating environment and pressurized enclosure using a full or partial vacuum.