The Flyby Resip Reusable Portable Straw is a telescopic, food-grade 304 stainless steel drinking straw that collapses into a small keychain case for easy on-the-go sipping. Telescopic Design: Extends from 3.9 inches up to 9 inches to fit 12 to 40 oz cups.Durable Build: Made from food-safe 304 stainless steel for hot or cold drinks.Easy Cleaning: Includes a long, telescopic scrub brush that fits right inside the carrying case.Compact Portability: Comes with an aluminum keychain case to clip onto bags or belts.