Designed in the USA and made of heat-safe silicone. the Hot Lips are a solution for drinking from hot single-wall titanium mugs. Simply place it on the edge of the mug for comfortable sipping. Set includes two units of Silicone Hot Lips. Please note: Hot Lips should be hand washed with detergent and air-dried. Pair the Hotlips 2 Piece Set with the Ti-Single Colored cup.