Safe and healthy material This food preservation lid cover is made of food grade silicone. It is and low temperature resistant, can be sterilized at temperature, and is suitable for refrigerating and freezing. Adsorption and stretching power The silicone sealing lid is soft, flexible and stretchable, adaptable to all kinds of round and square utensils. It has good adsorption, can tightly attach to containers, and provides a strong seal. Reusable and easy to clean The lid is soft and flexible, easy to clean with a quick rinse, reusable, and recyclable. How to use Hold the container steady, place the lid at a corner, slowly stretch the lid to cover the entire container to ensure a seal. Use scenarios Cover bowls and containers of various shapes to store leftovers in the fridge or freezer. Seal pots, jars, and lunch containers to prevent leaks during transport. Use during meal prep or marinating to cover ingredients and keep odors contained in the fridge.