MTP SWEETEA is Tumbler company. Our company develops Tumblr to reduce inconvenience for customers when drinking beverages. They can be used in travel, Hissa, in cars, and care about safety, not just temperature. I will try to use a more comfortable and secure tumbler in the future. The sweet tumbler is constructed with a USB hotplate together, keeps the drink warm and maintainable from the beginning to the end, keeping the temperature of 60 degrees warm after 2 hours even if cold water is put in. And it is a safer material with no environmental hormone, it is an excellent tumbler for cleaning and safety using individual hot plate.