I discovered a neat trick with an older project of mine, once you burn your candle down to the bottom you can use it as a planter. There is even already a hole in the bottom from the wick. I switched to a smaller diameter wick with the 2nd batch of candles I made so the walls stay fairly intact as it burns down. I thought of this idea a while ago, but it took me forever to actually burn a candle down and investigate.
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