Candle moulds are made from the most various material.
Basically you can cast the candle wax basically into every material, making the candle unique which is one of the oldest people's invention.
In the past, candles played only a functional role. The lighting. As time passed, candles was going increasingly to become a kind of ornament, a gift, or an enchanting instrument that makes a celebration more magical.
So nowadays, the appearance of the candles are even more important than their real functioning.
Custom candles have become so widespread and popular that many people are keen to make candles at home by him or herself or even prepare the moulds at home.
The moulds may be disposable, e.g. when they pour the wax into a glass.
But if you want to cast the same replica more than once, a silicone candle mould may be the best choice.