http://astore.amazon.com/diaxaris-20 These items go for just over $20 each at Amazon

An introduction to these very small kitchen appliances intended for camper, truck and small boat use. These are among some of the very limited choices you have in the realm of kitchen items which are able to run on native 12v power. They use a standard car cigar lighter type plug. I got these from Amazon.com in the low $20s, but you can also find them at truck stops and RV supply places in the $25-$30 per item price range.