Instruction: 
1. The product is easy to be used and take . 
2. Plug the power cord to USB port directly, the drink will heated by USB power automatically at a few munites. You don't need to have any action. 
3. Adding the carbon fiber as the strong heating material, can keep the stable temperature. 
4. Can provide various of styles by your requirement 
Intend people: Who have to work in front of computer for a long time. 

Convenient! Safe! Cheap! A good assistant!