Is Sous Vide Plastic Safe to Cook In?

Sous Vide Plastic Is Safe to Cook In

Is sous vide plastic safe to cook in? This question often arises among cooking enthusiasts who have embraced the sous vide method. In this blog post, we will delve into the types of plastics used for sous vide cooking and explore their safety levels.

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We’ll start by discussing what sous vide is and its benefits before examining various plastic materials such as PET, low-density polyethylene, and others commonly used in vacuum bags. Furthermore, we will address potential risks associated with using these plastics while cooking your favorite sous vide recipes.

Lastly, we’ll look into other options for those worried about the security of their cooking procedure besides traditional plastic bags. By understanding all aspects of this topic, you can make informed decisions when it comes to answering the question: “Is sous vide plastic safe to cook in?

A Brief History of Sous Vide

The concept of sous vide can be traced back to the late 18th century when Sir Benjamin Thompson experimented with low-temperature cooking techniques. However, it wasn’t until the 1970s that French chef Georges Pralus popularized this culinary approach by using it at his restaurant Troisgros. Sous vide is now a widely-used approach in numerous kitchens globally.

How Does Sous Vide Work?

In order to cook food using the sous vide method, you will need three essential components: an immersion circulator (also known as a precision cooker), plastic bags or containers specifically designed for sous vide use, and a water bath large enough to hold your sealed ingredients.

  1. Immersion Circulator: This device heats up water while maintaining accurate temperatures throughout the entire duration of your cook time. Immersion circulators are available at various price points depending on their features and capabilities.
  2. Sous Vide Bags/Containers: Food-safe plastic bags or containers are necessary for sealing your ingredients before placing them into the water bath. Vacuum-sealing is preferred but not required; a simple zip-top bag can work as well, using the water displacement method to remove air.
  3. Water Bath: A large pot or container filled with water is used as the cooking environment for your sealed ingredients. The immersion circulator will be attached to this vessel and maintain consistent temperatures throughout the cooking time.

Once you have all three components in place, simply set your desired temperature on the immersion circulator, seal your food in a sous vide-safe bag or container, and submerge it into the water bath. Cooking times vary depending on factors such as ingredient type, thickness, and desired doneness level. However, one of the key advantages of sous vide is its forgiving nature when it comes to timing – leaving food in slightly longer than necessary typically won’t result in overcooking.

With the right equipment and a little practice, sous vide cooking can elevate your culinary skills to new heights, allowing you to create restaurant-quality dishes in the comfort of your own home.

Sous Vide Plastic Wrapped Food

What are the Benefits of Sous Vide Cooking?

Sous vide cooking has gained popularity among home cooks and professional chefs alike due to its numerous benefits. This innovative method offers precise temperature control, improved texture and flavor, as well as greater food safety. Let’s explore these advantages in more detail.

Precise Temperature Control

One of the main attractions of sous vide cooking is its ability to maintain a consistent temperature throughout the entire cooking process. Unlike traditional methods such as frying or baking, where heat can be unevenly distributed, sous vide allows for even heating by circulating water around vacuum-sealed bags containing your ingredients. This precision ensures that your food will be cooked evenly from edge to edge without any risk of overcooking or undercooking.

Improved Texture and Flavor

The gentle and consistent heat provided by sous vide cooking helps preserve your ingredients’ natural textures and flavors better than other high-heat methods like grilling or sauteing. For example, proteins such as meat remain tender while vegetables retain their vibrant colors and crispness when cooked using this technique. Additionally, since all juices are contained within the sealed bag during sous vide cooking, flavors are intensified, resulting in delicious dishes with minimal added fats or oils.

Greater Food Safety

Cooking at lower temperatures for extended periods not only enhances taste but also contributes to increased food safety. The USDA states that harmful bacteria can grow rapidly between 40°F and 140°F, known as the “danger zone.” Sous vide cooking typically occurs within this range but extends the cooking time to ensure that any potential pathogens are eliminated. This technique also enables food to be pasteurized at temperatures lower than usual, diminishing the likelihood of contracting foodborne illnesses.

Convenience and Consistency

Sous vide offers the convenience of preparing meals in advance or batch cooking and providing consistent results through vacuum-sealing and water bath heating. Vacuum-sealing your foodstuffs with spices and storing them in the fridge is an easy way to make meals ahead of time or in bulk. When it’s time to eat, simply place the bags into a preheated water bath and let them cook until they reach your desired level of doneness. This hands-off approach ensures consistent results every time, making it perfect for busy households or those looking to simplify their meal prep routine.

Is Sous Vide Plastic Safe to Cook In?

One of the most common concerns when it comes to sous vide cooking is the safety of plastic bags or containers used in the process. While some plastic products release estrogenic chemicals, such as bisphenol A (BPA), which can harm human health, many plastic bags and containers are perfectly safe for sous vide cooking.

When choosing plastic bags or containers for sous vide cooking, it is important to look for products that are specifically designed for this cooking method. These bags are made from food-grade materials that are safe for use in hot water baths. Some popular options include low-density polyethylene (LDPE) bags, vacuum bags, and silicone bags. It is also important to note that many plastic products are now labeled as “BPA-free,” which means they do not contain bisphenol A or other harmful chemicals.

While it is generally safe to use plastic bags or containers for sous vide cooking, it is important to follow proper cooking guidelines and avoid using plastic products that are not specifically designed for this cooking method. It is also important to avoid using plastic products made from polyvinyl chloride (PVC) or plastic wraps that are not labeled as safe for use in hot water baths.

In conclusion, sous vide cooking is a safe and effective cooking method that can produce delicious and perfectly cooked dishes. You can enjoy the benefits of sous vide cooking without any safety concerns by using the right equipment and following proper cooking guidelines.

The Gist: 

Sous vide is a popular cooking method that involves sealing food in plastic bags or containers and submerging it into a temperature-controlled water bath. While some plastic products can release harmful chemicals, there are many safe options available for sous vide cooking such as LDPE bags, vacuum bags, and silicone bags. With the right equipment and following proper guidelines, sous vide cooking can produce delicious dishes with enhanced flavors and textures.

Breville Polyscience HydroPro Plus

What types of Plastic are Used for Sous Vide?

For sous vide cooking, plastic bags or containers are necessary to contain food while it cooks in a temperature-controlled water bath. Choosing the right type of plastic that can withstand high temperatures and not leach harmful chemicals into your food is essential.

Polyethylene Terephthalate (PET)

The most widely used plastic for sous vide cooking is polyethylene terephthalate (PET). PET is a clear, strong, and lightweight material commonly found in water bottles, salad dressing containers, and other food packaging materials. This type of plastic has been tested extensively for its safety when exposed to heat during sous vide cooking.

  • BPA-free: PET does not contain bisphenol-A (BPA), an endocrine-disrupting chemical found in some plastics that may pose health risks when heated.
  • Heat resistance: PET can typically withstand temperatures up to 500°F (260°C) without melting or releasing harmful substances into your food.

Melting Point of PET

The melting point of PET is around 260°C (500°F), which is significantly higher than the temperatures typically used in sous vide cooking (usually between 50°C and 85°C or 122°F and 185°F). This means that when using proper temperature settings, there should be no risk of the plastic melting or releasing harmful chemicals into your food.

BPA-Free Plastic Bags

A concern with some plastics is the presence of bisphenol-A (BPA), a chemical linked to potential health risks. Fortunately, most high-quality sous vide bags are made from BPA-free materials like PET. When shopping for sous vide bags, look for products labeled as “BPA-free” to ensure you’re choosing a safer option.

Tips for Using Sous Vide Bags Safely

  • Choose quality bags: Opting for reputable brands can help guarantee that their products meet safety standards set by organizations such as the FDA.
  • Avoid overfilling: Overfilling a sous vide bag can cause it to burst, potentially exposing your food to harmful chemicals. Be sure not to exceed the recommended fill capacity of your chosen bag.
  • Monitor cooking temperature: Keep an eye on the water bath’s temperature during sous vide cooking and ensure that it stays within safe limits for PET plastic (below 260°C or 500°F).
  • Inspect bags before use: Check for any signs of damage or wear in your sous vide bags prior to using them. Discard any damaged or worn sous vide bags and replace them with new ones.

In conclusion, as long as the necessary precautions are taken, it is generally believed that PET materials can be safely used in sous vide cooking. By choosing BPA-free bags from reputable brands and monitoring temperatures closely, you can enjoy delicious meals cooked via this method without worrying about potential health risks associated with plastic materials.

Polypropylene (PP) & High-Density Polyethylene (HDPE)

For sous vide cooking, other plastics such as PP and HDPE can also be employed apart from PET. Both PP and HDPE are considered safe for food storage and have a melting point around 320°F (160°C) and 248°F (120°C), respectively. However, their safety in sous vide cooking has not been as thoroughly tested as that of PET.

  • BPA-free: Like PET, both PP and HDPE are BPA-free plastics.
  • Heat resistance:  It is essential to monitor the temperature during sous vide cooking to ensure these plastics remain safe for use.

Polypropylene (PP) Bags

Polypropylene is a versatile plastic commonly found in food storage containers and microwave-safe dishes. Some experts believe that PP bags may be safer than PET due to their resistance to heat; however, more research is needed before this claim can be confirmed.

High-Density Polyethylene (HDPE) Bags

HDPE, a type of plastic utilized in the fabrication of grocery bags and freezer-safe storage receptacles, has a high melting point which may provide resistance to chemical leaching during sous vide cooking. Although some people use HDPE bags for sous vide cooking without any issues, further studies are required to determine if they’re completely safe or if there’s still potential risk involved.

Note on BPA-Free Plastic Bags

In recent years, concerns about bisphenol A (BPA), a chemical found in some plastics, have led to the production of BPA-free plastic bags. Despite being BPA-free, some plastic bags used for sous vide cooking may still contain other chemicals that can leach into food. It’s essential to research and choose reputable brands when purchasing plastic bags for sous vide cooking.

In conclusion, when it comes to choosing the right plastic for sous vide cooking, it is best to stick with PET or other plastics that have been extensively tested for safety. Always make sure to use BPA-free plastics and monitor the temperature during cooking to ensure the plastic remains perfectly safe. If you are still concerned about using plastic bags, you can also consider using silicone bags or vacuum-sealed glass jars instead.

The Gist: 

Sous vide cooking requires the use of plastic bags or containers, and it is essential to choose the right type of plastic that can withstand high temperatures and not leach harmful chemicals into your food. The most widely used plastic for sous vide cooking is polyethylene terephthalate (PET), which has been extensively tested for safety when exposed to heat during sous vide cooking. Other types of plastics such as polypropylene (PP) and high-density polyethylene (HDPE) are also sometimes used but have not been as thoroughly tested as PET.

Potential Risks of Using Plastic Bags for Sous Vide

Due to the potential for leaching of chemicals and melting/burning, caution should be exercised when using plastic bags for sous vide cooking. Some concerns include leaching of chemicals into the food and the risk of melting or burning if the bag is exposed to too much heat.

Chemical Leaching

One concern when using plastic bags for sous vide cooking is that harmful chemicals may leach into your food as it cooks. This can occur when certain plastics come into contact with hot water or high temperatures, causing them to release potentially toxic substances such as bisphenol-A (BPA) and phthalates.

BPA has been linked to various health issues like hormone disruption, heart disease, and even cancer. Phthalates have also been connected to reproductive problems and developmental disorders. To minimize this risk, choose BPA-free plastic bags specifically designed for sous vide cooking.

Melting or Burning Plastic Bags

If a plastic bag comes into direct contact with an immersion circulator’s heating element or gets trapped against a hot surface during sous vide cooking, it could melt or burn. This not only ruins your meal but also poses additional safety hazards such as releasing toxic fumes from melted plastics.

  • Maintain Proper Water Levels: Ensure that you maintain adequate water levels throughout the entire cook time so that your bag does not touch any heated surfaces within your container.
  • Use a Sous Vide Rack: A sous vide rack can help keep your bags separated and prevent them from touching the heating element or other hot surfaces.
  • Avoid Overcrowding: Do not overcrowd your container with too many bags, as this may cause some to get trapped against heated surfaces. Cook in smaller batches if necessary.

In summary, using plastic bags for sous vide cooking can be done safely by selecting BPA-free materials intended for this application and following appropriate safety protocols. If you’re still concerned about plastic safety, you can also consider using silicone bags, which are a safer alternative to plastic bags. Additionally, low-density polyethylene (LDPE) and vacuum bags are also perfectly safe for sous vide cooking.

The Gist: 

Sous vide cooking in plastic bags can pose potential risks such as chemical leaching and melting or burning of the bag. To minimize these concerns, use BPA-free plastic bags designed for sous vide cooking, maintain proper water levels, use a sous vide rack to keep bags separated, and avoid overcrowding the container. Alternatively, consider using silicone or low-density polyethylene (LDPE) bags which are safer alternatives to plastic.

Alternatives to Plastic Bags for Sous Vide Cooking

For a safer and more eco-friendly option, consider using glass jars, silicone bags or stainless steel containers instead of plastic bags for sous vide cooking. 

Glass Jars

Glass jars are an excellent alternative to plastic bags because they don’t contain any harmful chemicals that could leach into your food during the cooking process. Additionally, glass is heat-resistant and can withstand high temperatures without breaking or melting. 

To use glass jars for sous vide cooking:

  • Choose a jar with a wide mouth and tight-fitting lid.
  • Fill the container with your foodstuff, leaving a little space at the peak for swelling as it cooks.
  • Screw on the lid tightly but not too tight – air should be able to escape as pressure builds up inside during cooking.
  • Submerge the jar in your water bath just like you would with a plastic bag.

Silicone Bags

Silicone bags, specifically designed for sous vide cooking, provide another safe alternative to traditional plastic bags. Silicone, free of BPA and other potentially hazardous chemicals when heated, is the material utilized in food-grade bags specifically designed for sous vide cooking. Silicone also has excellent heat resistance properties making it suitable for long cook times at high temperatures required by many sous vide recipes:

  • Choose a silicone bag that is specifically designed for sous vide cooking, ensuring it can withstand the required temperatures.
  • Fill the bag with your ingredients and press out as much air as possible before sealing.
  • Submerge the bag in your water bath just like you would with a plastic bag. You may need to use a clip or weight to keep it submerged if it tends to float.

Stainless Steel Containers

Stainless steel containers, such as food storage boxes or pots, are another option for those looking to avoid using plastics during their sous vide cooking process. Stainless steel is non-reactive and has excellent heat conductivity properties, making it an ideal choice:

  • Select a stainless steel container that will fit inside your water bath setup and can accommodate the size of your food items.
  • Add your ingredients into the container and cover tightly with either its own lid or aluminum foil.
  • Place the covered container into your water bath – be sure not to let any water get inside.

In conclusion, there are several alternatives available when choosing materials for sous vide cooking other than traditional plastic bags. Glass jars, silicone bags, and stainless steel containers offer safe options without compromising on quality or taste while being more environmentally friendly than single-use plastics.

The Gist: 

There are alternatives to plastic bags for sous vide cooking, including glass jars, silicone bags, and stainless steel containers. Glass jars are heat-resistant and do not contain harmful chemicals; silicone bags are made from food-grade silicone and can withstand high temperatures; while stainless steel containers have excellent heat conductivity properties. These options offer safe choices without compromising on quality or taste while also being more environmentally friendly than single-use plastics.

Frequently Asked Questions

Is Sous Vide Cooking in Plastic Safe?

As a lover of cooking sous vide, you may wonder if cooking in plastic bags is safe. The answer is yes, sous vide cooking in plastic is generally safe when using food-grade, BPA-free bags specifically designed for high-temperature cooking. It is important to ensure that the bag’s material can withstand temperatures up to 195°F (90°C) and to avoid using non-food-grade plastics or recycled materials.

Are There Any Food Safety Dangers with Sous Vide?

Sous vide has minimal food safety risks if done correctly. To ensure food safety, use proper vacuum sealing techniques, maintain appropriate temperature ranges for specific foods, and follow recommended cook times to prevent bacterial growth. Additionally, use safe food handling practices.

Is BPA-Free Plastic Safe for Sous Vide?

BPA-free plastics are considered safer than those containing bisphenol-A (BPA). However, it is important to ensure that the BPA-free plastic used is also rated as high-temperature resistant and approved for direct contact with food during cooking to minimize potential chemical leaching.

What are Disadvantages of Sous Vide Cooking?

Limited browning: Sous-vide-cooked foods lack the Maillard reaction’s crusty exterior unless seared after cooking.

Cooking time: The low-and-slow approach means longer cook times compared to traditional methods.

Potential overcooking: If cooking time is not monitored closely, delicate proteins like fish may become mushy in texture.

Elevated equipment costs: Sous-vide setups require specialized tools such as immersion circulators or precision cookers.


Using the right plastic bags for sous vide cooking is generally safe as long as they are made from food-grade materials. PET is a popular selection for its strength and safety, yet PVC or low-density polyethylene should be shunned as they may bring about potential health dangers.

However, it’s important to note that some potential risks are still associated with using plastic bags for sous vide cooking, including the leaching of chemicals into the food at high temperatures. Alternatives such as silicone or glass containers can be used to minimize these risks.

It’s important to carefully consider the type of plastic being used and take necessary precautions when cooking with sous vide. For example, using BPA-free plastic bags can reduce the risk of chemicals leaching into the food. Vacuum bags made specifically for sous vide cooking, such as those from Anova, are also a good option.

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