1,hotsale heating cup with USB 2.material,SBR CR,carbon fiber, 3. ... ,30*9cm introductionName,promotional keep cup warm heating cup with USBMeterial, SBR CR,carbon fiber,denim Input power,4W ... + 0.5W Input Voltage,PC USB 5V Temperature,40-45 SIZE,30*9cmdetailed introductionBurning the ... coffee, tea, Milo or soup will be warm for hours! promotional keep cup warm heating cup with USB