Renewable energy
A 'Stirling' idea for charging your cell phone
...charger drawing 1000 mA or less, it's as simple as connecting the onE Puck to your device and setting your drink down.
From their Kickstarter page:
“Say you are out for a night at the bar and your phone battery dies. Rather than awkwardly moving to a corner to plug in your charger, or leaving altogether, you ca...