One of the latest releases from RF Laserworks is this heat-sensitive backing for the iPhone 4. Coming in at .005” thick, the backing fits nicely under any bumper (in case you want to put it away) and changes colors in the range of 90 to 95 degrees F – or just below body temperature. Priced at $12 USD, the self-adhesive piece comes in both a solid version and one with an Apple logo cut-out. Get yours now here.
Source: Culture Shoq