Epiphany onE Puck (2013) Can charge your smartphone!
The Epiphany onE Puck
It seems the ultimate camping gadget: with the Epiphany onE Puck you can charge your iPhone with the heat of a cup of coffee, so you don't need an outlet or precharged batteries. You put your cup on the red side of the charger, stitch once the blue light is on your iPhone cable in and it starts charging. It work also with a cold drink, according to the creators.
The onE Puck uses a Stirling engine, which is already used to produce energy with heat differences. As you drink your coffee and the coffee cools down, the heat difference get smaller, which allows the device to malfunction. The onE Puck works with an iPhone, iPad, iPod touch and all Android devices.
A donation of $ 130 will ensure a onE Puck once the project within the planned $ 100,000 has achieved. It is likely that this will happen: currently they have $ 75,000, with one and a half month to go.