Candles made of toughened glass so breakages are rare. Purchasing a Firelight Glass Candle means having the candle for life as opposed to wax candles which can be expensive and are gone within a short period of time. Wicks are made of fibreglass and don't burn. They can be trimmed when necessary. Oil is pure paraffin, slow burning, smokeless and odourless. Comes in clear and coloured blue, red, purple, green and gold.