Introducing our innovative solution to address the issue of wrinkles caused by drinking water through a straw. Our anti-wrinkle straw topper is specifically designed to be compatible with Stanley Tumbler. With its unique tilted 40 opening design, this anti-lip wrinkle straw stopper perfectly fits the lips, eliminating the need to hold the straw and forcefully suction. Simply press your lips against the opening and enjoy drinking water without engaging the muscles of your side cheeks. It's ideal for use during the recovery period of lip filling or for everyday use. This wrinkle-resistant stopper is flexible and compatible with Stanley straws, as well as other glass, silicone, or plastic straws with a diameter of 10mm. You can easily switch it to the straw of your choice for different cups. Please note that this product is a straw accessory and does not include straws. For added convenience, our anti-wrinkle straw topper comes with a straw cover. After use, simply remove the topper and transfer the straw head to the cover, preventing dust from entering the straw. It's a clean and hygienic solution. This product also makes a great gift for moms, daughters, lovers, and girlfriends. Made from 100% food-grade silicone, our no-wrinkle straw topper is soft, BPA-free, environmentally friendly, and reusable. You can use it with confidence. Cleaning is a breeze as it can be hand-washed or placed in the dishwasher. Key Features: Compatible with Stanley Tumbler Tilted 40 opening design for easy drinking Flexible use with various straw types Comes with a straw cover for hygiene Made from 100% food-grade silicone Soft and reusable Easy to clean Ideal gift for loved ones