The candle-making craft has lasted centuries. Although people initially used candles as a source of light, they have quickly evolved into integral décor pieces. In fact, scented and uniquely designed candles are more popular than the traditional plain candle. However, you need the right supplies to make high-quality candles, and a double boiler is crucial. Notably, most hobbyists start with a single saucepan but soon find out they are better off with a double boiler.