Straw Material: Food-grade Stainless Steel Straw length (Min - Max) : 2.6 - 9.0 inch Straw Weight: 0.5 oz Package Size: 0.3 x 0.09 x 0.09 inch Package Weight: 2.5 oz Warming tips: 1. Straws boil disinfection is the necessary step before the first use. 2. Vinegar can clean the incrustation perfectly.