0.4''/10mm Wider Design: designed for milkshakes, smoothies, soups, hot cocoa and other thick drinks! Drink more smoothly, even if sucking hard will not collapse and deformation, goodbye to the thin straw clogging trouble. Safety: Made of 18/8 stainless steel, corrosion-resistant, rust-resistant and odorless, can be used for both hot and cold drinks (-20℃~120℃/6.67°F~224°F), and children can use it safely. Easy to Clean: Comes with a slim cleaning brush to easily remove residue; smooth interior does not harbor dirt and is dishwasher safe. Reusable: 1 reusable straw=500 plastic waste reduction! Take it with you on outdoor picnics, coffee shop take-outs or office drinking. Worry-Free After-Sales: we offer a 2-year quality guarantee for each straw! Please feel free to contact us if any craftsmanship or material issues arise.