We developed the pack of 4 8mm stainless steel straws as a reusable solution for disposable plastic straws, and as an ideal accessory for our 16 oz or 20 oz insulated cups and one-pint steel cups. Whether you're drinking smoothies, squeezed juice or iced coffee, Klean Kanteen straws make drinking easy and safe. Our straws are made of high-quality 18/8 stainless steel with a flexible tip made of safe, food-grade removable silicone. No more plastic, just your favorite drinks while traveling.