Do you like candles? I love IKEA TINDRA candles. They cost €1.65 but they last long and they smell lovely. I came up with idea of reusing glass jar and making a candle holder. I usually have at home a lot of tea-light candles therefore it's handy to have some candle holders. So here it is:
Here is an old IKEA candle. All you need to do is poor a hot water into the glass and wait for a minute. Then you will be able to remove remaining wax.