Assembly method: The cup lid is made of soft silicone, which has strong flexibility. The handle of the cup lid can be tilted through the hole in the middle of the petals to successfully install it. When installing from small petals to large petals, first press down the large petals on both sides by hand to make the installation hole larger, and then use the cup lid handle to tilt and insert to complete the installation! You can apply force during installation without damage!Keep Hot: Guxiton silicone cup covers from Guxiton is the ideal choice for maintaining a constant temperature for your tea or coffee while you're busy, ensuring the perfect drinking temperature.Material:Food grade silicone, safe, non-toxic, environmentally friendly, durable.Guxiton Silicone Cup Covers: (4.13-inch diameter) Suitable for most mugs, glass cups, and cups of other materials. Our silicone covers are exquisitely designed, brightly colored, and can keep your tea and coffee at the optimal temperature.High Temperature Resistant: Guxiton Silicone cup covers can withstand temperatures from -40~230 F, and silicone can be safely used in extreme temperatures, making it safe and reliable.Health:Keep your drink at the optimal temperature, protect it from dust, Enjoy a pleasant mood every day.