Should I buy this?

It's only $31 and it heats and cools. Yea it can only hold 7 L but it would be nice for my upcoming adventure.http://www.amazon.com/Wagan-2577-Personal-Fridge-Warmer/dp/B001RKH7FS/ref=sr_1_1?ie=UTF8&qid=1406589114&sr=8-1&keywords=portable+fridge