Product review (3 stars): Could be better
Other reviewers have said that this thing won't cool down your drink. They're right. It'll certainly slow down the warming up of your drink, but don't expect it to freeze anything. All that's in this thing is a peltier element with a fan on the bottom. I've never tried putting it on the I (others have had issues) but on II the bottom of the inside gets nice and chilly. Too bad heat rises and cold air doesn't! Also, I do NOT recommend plugging this into a bus-powered USB hub. Make sure it gets at least 500+ mA or else you might blow a fuse or something.