A 'Stirling' idea for charging your cell phone
...ice your own.
image via Trend Setter News
How it works:
The oNE Puck could not be easier to use. Compatible with all iPhones, iPods, Android phones, and any device that uses a USB charger drawing 1000 mA or less, it's as simple as connecting the onE Puck to your device and setting your drink down.