Introducing a USB powered cooler. Peltier element semiconductor keeps cans and plastic bottles cool with the power of electricity. It won't get warm over time like a thermos or ice pack! Great for office, camping and veramping. Can cooler is small enough to be carried around. Put it in your bag and carry it on the go. In addition, the silent design allows you to use it in the office and so on, you can hardly hear it. It can be used in a variety of locations, so you can use it for a wide variety of purposes. It is also recommended to put chocolate treats and other items that are easy to melt.