Incase is always releasing cool new versions of their bare-bones and popular Snap Case for the iPhone4/4S, and the latest is the Thermo Snap Case. This one is temperature-sensitive, and the colour changes when it comes into contact with heat or cold. Only pink is available for now, but this is something we wouldn’t mind seeing in a range of colours. The price is $35 and you can snag it at the Incase webstore.