1,promotional usb warm cup 2.material,SBR CR + carbon fiber,USB cable,denim ... power 3w size 30*9cm temperature 50-55 colorred material SBR CR,carbon fiber,USB cable,denim specification ... keeping the drink warm2.Made of the high quality neoprene material which can fit for different size of the cup ... outside4.Adding the carbon fibre as the strong heating material,can release the heating at the short time ...