2024 NEW IDEA: Using a straw to drink water can lead to repeated lateral muscle movements. Long-term use may contribute to lip lines, facial and chin wrinkles, and changes in lip appearance. To address this, we designed an anti-wrinkle straw topper compatible with Stanley Cup. DRINKING WATER IS MORE RELAXED: This anti-lip wrinkle straw stopper features a tilted 40-degree opening design that fits the lips comfortably, reducing the need to clamp the straw or use excessive cheek muscle effort. Simply press the lips against the opening to drink with minimal muscle strain. Ideal for use during recovery after lip treatments or for everyday use. FLEXIBLE USE: This wrinkle-resistant stopper fits Stanley straws and other glass, silicone, or plastic straws with a 10mm diameter. Easily transfer it between straws for different cups. Note: This is a straw accessory and does not include straws. COMES WITH STRAW COVER: After use, remove the wrinkle-free straw topper and use the included cover to protect the straw opening, helping prevent dust and maintain hygiene. A thoughtful gift for mom, daughter, partner, or friend. 100% FOOD GRADE SILICONE: Made from food-grade silicone, this no-wrinkle straw stopper is soft, BPA-free, environmentally friendly, and reusable. Safe for daily use. Easy to clean by hand or in the dishwasher.