Can You Use Meal Prep Containers for Sous Vide? What to Know Before Trying

Yes, you can use meal prep containers for sous vide, but only if they are made from materials that withstand prolonged heat exposure without leaching chemicals or warping. The key is to choose containers labeled BPA-free polypropylene (PP, recycling #5) or tempered glass, and to avoid single-use plastic or containers not rated for high temperatures.

Quick Answer

Meal prep containers can work for sous vide if they are heat-safe and properly sealed. Glass jars and BPA-free polypropylene containers are the best options. Avoid thin plastic or containers not designed for high heat.

Safe materials: Polypropylene (PP #5) and tempered glass are heat-safe for sous vide up to 212°F (100°C).
Unsafe materials: Polystyrene (#6) and polycarbonate (#7) may warp or leach chemicals at sous vide temperatures.
Sealing: Containers must have airtight, leak-proof lids to prevent water ingress and ensure even cooking.
Weight: Glass jars need to be fully submerged; use a weight or magnet to keep them underwater.

Which Meal Prep Containers Are Safe for Sous Vide?

The most important factor is the plastic type. Flip the container over and check the recycling number inside the triangle. Polypropylene (PP, #5) is the only common plastic that can handle sous vide temperatures (typically 130-185°F) without melting or leaching. Many meal prep containers from brands like Rubbermaid, Sistema, and Pyrex (glass) are made from PP or tempered glass.

Tempered glass containers with locking lids are also excellent for sous vide. They transfer heat well, don’t absorb odors, and are easy to clean. Avoid regular soda-lime glass, which can shatter from thermal shock. Always use containers with tight-fitting silicone or plastic lids designed for sous vide or canning.

Never use single-use takeout containers, deli cups, or containers made from polystyrene (#6) or polycarbonate (#7) — they can warp, release chemicals, or crack under heat.

How to Use Meal Prep Containers for Sous Vide

Choose containers made from PP #5 or tempered glass with airtight lids. Ensure the lids have a rubber or silicone gasket for a watertight seal.
Fill the container with your food, leaving some headspace for liquids to expand. Seal the lid firmly.
Place the container in your water bath. If it floats, use a sous vide weight or a stainless steel butter knife to hold it down. For glass jars, you can also place a small plate on top.
Set your sous vide cooker to the desired temperature and cook as usual. Add 15-30 minutes to the cook time if the container is thick or if you’re cooking multiple containers at once.
After cooking, remove the container carefully with tongs or a heat-resistant glove. Let it cool slightly before opening to avoid steam burns.

Benefits of Using Meal Prep Containers for Sous Vide

Portion control: Perfect for cooking single servings of proteins, vegetables, or eggs for meal prep.
No bag waste: Reusable containers reduce plastic waste compared to vacuum-sealed bags.
Stackable storage: Cook directly in the container you’ll store in the fridge, saving space and cleanup time.
Flavor infusion: You can marinate and cook in the same container without leaks.

These containers are especially handy for cooking eggs (soft or hard boiled), fish, chicken breasts, and vegetables like carrots or potatoes. They also work well for making yogurt or infusing oils.

Common Mistakes When Using Meal Prep Containers for Sous Vide

Using containers with non-airtight lids: Even a small gap lets water seep in, diluting flavors and risking contamination. Always test the seal by submerging an empty container in water and squeezing gently — no bubbles means it’s airtight.
Overfilling: Liquids expand when heated. Leave at least 1/2 inch of headspace for liquids and 1 inch for solid foods to prevent the lid from popping open.
Not fully submerging the container: Floating containers cook unevenly. Use a weight or a sous vide rack to keep them fully underwater.
Using containers that are too thin: Thin plastic (like takeout lids) can warp or crack. Stick to containers with thick walls and sturdy lids.

Tips for Best Results

Pre-warm glass containers with hot tap water before adding hot food to prevent thermal shock.
For eggs, use a silicone egg mold or a small glass jar with a lid for perfect poached or hard-boiled eggs.
Label containers with a piece of masking tape and a marker to track cooking times and contents.
If you’re cooking multiple containers, make sure they aren’t touching the circulator intake for proper water flow.
After cooking, chill containers in an ice bath for rapid cooling if you plan to store them for later.

Pro Tips

Use a sous vide weight or a stainless steel utensil to keep glass jars submerged — they tend to float.
If your container’s lid doesn’t have a silicone gasket, cover the opening with plastic wrap before sealing to improve water resistance.
For eggs, fill the container with water and crack the egg into it for easy poached eggs without a bag.
Wash containers with a baking soda paste to remove any lingering fish or garlic odors after sous vide cooking.

Common Mistakes to Avoid

Don’t use containers with metal lids or metal parts — they can react with the water or cause sparking if near the circulator.
Avoid microwaving sous vide containers immediately after cooking — rapid temperature changes can crack glass or warp plastic.
Don’t assume all BPA-free plastic is heat-safe — check for the PP #5 symbol specifically.
Never stack containers directly on top of each other in the water bath — water must circulate freely around each one.

FAQ

Can I use glass meal prep containers for sous vide?

Yes, tempered glass jars like Pyrex or Weck jars work great. Just ensure the lids are airtight and avoid thermal shock by pre-warming the glass if adding hot food.

What temperature can plastic meal prep containers withstand?

Polypropylene (#5) can typically handle temperatures up to 212°F (100°C), which covers most sous vide recipes. Always check the manufacturer’s rating to be safe.

Do I need to adjust cooking times when using containers?

Add about 10-20% more time compared to vacuum-sealed bags, especially for thick containers or multiple containers, since heat transfer is slightly slower through plastic or glass walls.

The Bottom Line

Using meal prep containers for sous vide is a practical, eco-friendly alternative to disposable bags — as long as you choose the right materials and seal them properly. Start with a simple recipe like chicken breast or eggs to get comfortable, and enjoy the convenience of cooking and storing in the same container.