I've actually got one of these just a few feet away. They do actually work to make a can sized...something...cooler. Don't expect to use it as a spare icemaker at parties, but yeah...it'll keep your drink cooler a little longer while you're in front of thut thar porn-surfin appliance!

I still haven't found a proper USB powered cup warmer that actually works well enough to keep your coffee warm...but that hunt will continue...