INCLUDE: 10 Containers + 10 Built in Vent Lids = 20 Piece Container Set Most Unique Set The Food Storage Container 20 Piece Set is BPA Free, Non-Toxic. Includes 10 glass food storage containers in small and large sizes with 10 Lids, removable silicone seal for easy cleaning. Stain and odor resistant. Perfect bento. These glass containers are perfect for storing leftovers or planning ahead with your weekly meal prep. Built In Vent If you want a container that you can pop directly in the microwave or oven, look for a glass container with built-in vents under the locking lid. This type of lid provides the airtight storage you need to keep your food fresh and the convenience you need to reheat food in seconds Airtight And Watertight Silicone Sealed BPA-Free Plastic Lid. Plus Four Tab Locking System. Versatile Use Reusable refrigerator, freezer, microwave and dishwasher-safe (Top shelf recommended), and oven safe up to 400 degrees fahrenheit without the lid. Premium Glass This glass meal prep container is crafted of high borosilicate transparent glass & can tolerate rapid temperature changes w/out warping or cracking. Safe to transfer from freezer to oven in an instant & wont absorb stains or smell. Satisfaction Guarantee Collisions may occur during product transportation, If you find that the glass containers are cracked, please contact us. Your satisfaction is our motivation.