Feature: 1. Spillproof: The replacement lid has a sealable thrust slider, which no longer worries about the overflow of water or drinks. There is also a check valve hole at the top of the slider to help prevent from splashing. 2. Silicone Gasket: The edge of the flat bottomed cup lid is lined with a black silicone gasket, which can help firmly cover the cup and effectively prevent splashes and major spills when the cup is turned over. 3. PP and AS: Made of safe and reliable PP and AS materials, the 30oz tumblers lid is corrosion and heat resistant, odorless and can be used for a long time. 4. Easy to Open and Close: Switch sliding cover design, easy to use. The hole on the top of the cup can be used directly or with a straw. The sliding cover design prevents you from touching your nose while drinking water. 5. 30oz Tumblers Lids: The lid cover can replace 30 ounces insulated car cups. Applicable to various scenarios, going out, self driving traveling, or daily use at home. Specification: Item Type: 30oz Tumblers Lids Product Material: PP, AS Gross Weight: 70g / 2.5oz Product Size: 10x10x1cm / 3.9x3.9x0.4in . Package List: 1 x 30oz Tumblers Lid