Chatting happily over a sumptuous dinner on the balcony, you bask in the warm summer breeze that blows gently past, sipping your wine and enjoying the company of a few special friends. The day is nearing dusk, so you reach over to light a candle and, as you do, soft music magically wafts from the candle holder, adding to the elegant mood. Your friends are impressed, and the evening is a hit. But where did that music come from? It came from Pelty, a Bluetooth-enabled, candle-powered speaker with an inbuilt thermoelectric converter that lets you play music streamed from your phone without the need for batteries or cables.