Never burn your mouth again. Enjoy your hot beverage for hours. Pour your coffee in and in 3 minutes it will be at a comfortable drinking temperature. Don't rush to drink it though, because It will stay just right for hours. This mug is made of stainless steel inside and out (brushed and electropolished). The BPA-free lid has a stainless steel anti-slosh shutter you can operate with one finger. Hand wash body. Dishwasher-safe lid. 16oz of drinking pleasure!