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 help 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 40-degree angled opening that fits the lips comfortably, reducing the need to clamp the straw or use excessive cheek muscle effort. Simply press your lips to the opening to drink with minimal muscle engagement. Ideal for use during recovery after lip treatments or for everyday use. FLEXIBLE USE: This wrinkle-resistant stopper is compatible with Stanley straws and other glass, silicone, or plastic straws with a 10mm diameter. Easily transfer it between straws for use with different cups. Please note, this is a straw accessory and does not include straws. COMES WITH STRAW COVER: After use, remove the straw topper and use the included cover to protect the straw opening, helping prevent dust and keep it clean and hygienic. A thoughtful gift for mom, daughter, partner, or friend. 100% FOOD GRADE SILICONE: Made from food-grade silicone, this straw stopper is soft, BPA-free, environmentally friendly, and reusable. Safe for everyday use. Easy to clean by hand or in the dishwasher.