These silicone can lids are made of high-quality silicone, so they can be reused, Withstand High Temperatures, and are easy to clean.There are 2 breathable slits On The Surface. When you are not drinking, please protect your drink to prevent dust and sand from entering your cans. They definitely help compared to a completely open soda in the short term, but it will not maintain the fizziness of a drink over several days. Size:External Diameter: 2.5 inch/6.4CM, Internal Diameter: 2.1 inch/5.5CM, Height: 0.47 inch/1.2CM. If you are not completely satisfied with your order, simply reach out to us through the Amazon messaging service and we will respond within 24 hours to make it right even on the weekends. We absolutely guarantee your satisfaction or your money back! Package Including: 6x Silicone Can Lids