Food-grade silicone is made of high-quality silicone. This protective silicone is not only durable, but also safe and reusable. The anti-overflow plug is made of high-quality food-grade silica gel to provide you with a high-quality and safe drinking experience. Knowing is always the first priority, and you can enjoy it with confidence. Fit: silicone leak-proof plug design is suitable for 40-ounce Cup and 30-ounce mug with handle. These silicone spill plugs have been carefully designed to match the exact size of your favorite cups and a tight fit. Splash-proof: installed in the suction pipe hole of the cover, it not only seals, but also fixes the suction pipe to prevent debris and dust from entering the suction pipe. Silicone leak-proof plug design is suitable for fittings, which can significantly reduce overflow and provide a better leak-proof solution for . Straw-friendly: silica gel leak-proof plugs, including 10 straw covers, 10 square spill-proof plugs and 10 round leak-proof plugs. The straw cover is compatible with straws with a diameter of less than 0.39 inch/10mm. It is compatible with most straws to more convenient drinking. Easy to install: We specially designed for 40/30 oz glass, which is very easy to install. These accessories can be inserted and pressed. There is no trouble or difficulty in using it. No matter whether you use it in travel or , our accessories can keep your drink in the cup and the surrounding environment clean. Colour:Transparent+white+blue+pink+black Material:Silica gel Size:Circle 2.1 x 1.1cm + Square 2.5 x 1.7 x 0.5cm + Strip 5cm Package Contents: 30 x Anti overflows Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.