Please confirm the Inner Diameter of your tumbler when choose lid. This Lid is Not compatible with some 20oz /30oz tumblers. Please check both the Inner Diameter of tumblers and width of Lids carefully before place order. Size：20oz lid: width:3.14", Fit tumblers with inner Diameter: 3.19''~3.25'' Size：30oz lid: width:3.63" , Fit tumblers with inner Diameter: 3.68''~3.74'' Notice: Please measure tumbler's Inner diameter, Not Outside diameter. Notice: Lids Not Fit tumblers with Screw Thread. This lid is made in AS, and the flip part is made in PP. Eco-friendly, non-toxic, safe for use. Spill-proof lid, Straw Friendly, very practical. Easy to replace your broken or old one lids.