Silicone Straw Tips Set: Includes 4 silicone straw tips and 4 silicone bottom tubes in each package. Designed to fit 8mm straws only. No More Metallic Taste: Love the durability of stainless steel straws but not the metallic taste? These silicone tips cover the mouthpiece so your lips don't touch the metal directly, giving you a cleaner, purer drinking experience. Quieter Sips with Bottom Tube: The separate silicone bottom tube helps prevent the stainless steel straw from rubbing against the bottom of your thermos or cup, reducing unwanted noise while you drink. Dishwasher Safe & Easy to Clean: Both the straw tips and bottom tubes are dishwasher safe, making cleanup quick and simple. They maintain their shape and cleanliness wash after wash. Lightweight & Travel-Friendly: These silicone accessories are small, lightweight, and easy to toss in your bag. Perfect for taking to work, the gym, or on vacation without adding bulk.