Sipping just got even better. Ergonomically designed for pucker-free sipping, the Stay Smooth Straw Topper contours to your mouth&';s natural shape. Made of silicone, it fits the QuencherA(R) H2.0 FlowState(TM) Tumbler or the Stanley Cross Bottle straw and is reusable, dishwasher safe and BPA-free. The anti-wrinkle straw topper comes in classic neutral tones so you can mix or match colors and keep your hydration glow going.