Every question, curiousity and doubt anyone has ever had about Peltier cells seems to be addressed in this FAQ from Tellurex.  I stumbled across it over the weekend, and yes …  it’s marketting material, but there’s still a lot of good information in there if you want to keep your favorite that beverage nice and chilly, or scavanage free energy using a heat differential.  If you didn’t know about Peltier cells, now’s a great time to look them up and figure out some fun things you can do with them (post the details below … I love these things)!