Some of the small yogurt containers make good moulds: smooth, straight sides and a nice size. Take care not to pour above 80oC as the container will melt.

Even though eggshells are bio-degradable you might like to use them as candle containers rather than throwing them away. Best of all: they float!

Recycle! Reuse!
Recycle empty tins, in this case a tuna tin, by using them as containers for candles. Some tins, like cooldrink & beer cans, make good moulds.
Thread some LX20 wick through a metal sustainer and anchor to the bottom of the tin with a thin layer of wax. Keep the wick centered while you fill [...]