iPhone 4s Bumper for flexPLA

We recently recieved our first batch of flex EcoPLA filament from http://www.formfutura.com (this is not intended as a blunt form of advertisement).

The qualities of this very interesting materials inspired me to make a bumper for the iPhone that can only be used if printed with flex PLA, but then fits really tight, like a real bumper.

The perimeter of the bumper has two recessed areas that make it easier to find the volume buttons and the power button without looking.

**Beware: this B