... silicone rubber 2.certified by FDA, SGS,LFGB officially 3.non-stick,durable,fledible 1. product name: Silicone cup cap,silicone ... to use for cup, anti-slip, durable,easy to wash6. Non-stick, flexible and easy to handle,high and low temperature ... resistant,non-toxic7. Color: Red, white, green, blue, other colors are welcomed8 ...