2 piece set: both stretch to twice their size. extend food life by sealing in freshness. after being stretched returns to original form within seconds. refrigerator, freezer and microwave safe. temperature range-40-degreef to 445-degreef/-40-degreec to 210-degreec. fda approved silicone. reusable, 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.
Norpro 529 Silicone Stretch Bowl Covers Clear Set of 2 B00AFPU21C