Technical index: Material: food grade silicone Color blue Size: Small: 6.3 x 3 x 13.1 cm Medium: 6.3 x 3 x 16.5 cm Large: 6.3 x 3 x 18.5 cm Folding thickness: about 3CM Weight: 100g / 136g / 165g The package includes: 3 Collapsible Silicone Food Storage Containers Safety Material, No BPA, Non-Toxic, Eco-Friendly, Can be used at -40C 230C (446F), Microwave and Fridge Safe, Note: Oven is not available The valve design is designed to allow hot gases to escape without forming water vapor. Therefore, it is not suitable for liquids that can leak out of the valve, e.g. such as water and soup. Each container can be folded to 1/3 the original size for compact storage and organization, saving much space and better food storage Suitable for indoor food storage, outdoor activities such as working, camping, hiking, traveling, etc., folded when not in use, easy to store, small footprint