Extend food life by sealing in freshness. Both stretch to twice their size. After being stretched returns to original form within seconds. Refrigerator, freezer, and microwave safe. Temperature range -40°F to 445°F / -40°C to 210°C. LFGB/FDA approved silicone. Reusable, eco-friendly alternative to plastic wrap and aluminum foil. Clings to stainless steel, porcelain, stoneware, plastic and glass creating an airtight seal. Silicone doesn’t degrade easily or lose its stretch. Disinfect by boiling in water to reuse.