2024 NEW IDEA: Using a straw to drink water can cause repeated lateral muscle movements long-term use can not only produce lip lines, and facial and chin wrinkles, but also make the lips convex, and in some cases, deform the face. To address this issue, we have designed an anti-wrinkle straw topper compatible with Stanley Cup.DRINKING WATER IS MOR RELAXED: This anti-lip wrinkle straw stopper features a tilted 40opening design that perfectly fits the lips, eliminating the need to hold the straw and forcefully allow suction. Simply press the lips against the opening, and you can drink water almost without using the muscles of the side cheeks. Very suitable for use during the recovery period of lip filling, or for daily use. FLEXIBLE USE: This wrinkle-resistant stopper is compatible with Stanley straws, or other glass, silicone, or plastic straws with a diameter of 10mm. You can freely switch it to the straw you want for different cups. Please Attention that this is a straw accessory and does not include straws. COMES WITH STRAW COVER: After use, you can remove the wrinkle-free straw topper and transfer the straw head to another interface to cover the straw, preventing dust from the air from entering the straw, clean and hygienic, The best gift for mom, daughter lover, and girlfriend. 100% FOOD GRADE SILICONE: This no-wrinkle straw stopper is made of food-grade silicone very soft, BPA-free, very environmentally friendly and reusable, you can use it with confidence. It is easy to clean too, and can be hand-washed or dishwasher-washed.