an ipod and a drink in a cup on a table next to a charger
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Coaster that charges cell phones with a coffee

Imagine charging your phone with the heat from your morning coffee. With the Epiphany onE Puck you can. The idea behind the Epiphany onE Puck is simple: use a Stirling engine powered by heat disparities (a hot or cold drink, a candle, ice, etc.) to fully charge your cell phone. Invented in the early 1800s, Stirling…

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