This reusable silicone food bag is made by food grade silicone material, non-toxic, tasteless and safe. It is designed with airtight seal to keep food fresh, vacuum and no leakage, ideal for food storage (milk / snack / sandwich / bread / vegetable / fruit / meat). Great heat and cold resistant, temperature resistant range -58 F-482 F, safe for refrigerators, microwave ovens, toasters, steamers, dishwashers. Folding design, it can be rolled up and save storage space. With capacity scale on the surface, it's easy to control the amount of liquid.