It is similar to the secondary kaeoklom, USB slot and comes with a small Sterling engine inside the device which adjusts temperature according to the user's needs.
It is similar to the second round glasses and a USB slot. Stirling engine with a small side of the device. Which automatically adjust the temperature according to the needs of users.
It is very similar to the coaster, round, and a USB slot. With small Stirling engine inside the device. Which is to adjust the temperature according to the needs of users.