Get baking today with Norpro Sili-Stretch Bowl Covers, Set Of 2 and create your own baking masterpiece. Norpro Sili-Stretch Bowl Covers, Set Of 2 . 10. 25" x 10. 25"/26cm x 26cm and 6" x 6"/15cm x 15cm. 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 -40F to 445F / -40C to 210C. 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 doesnt degrade easily or lose its stretch. Disinfect by boiling in water to reuse.