The Tube Lamp fits all glass bottle with a standard sized opening (5/8" to 3/4"). The Tube Lamp consists of a glass tube that goes into the bottle (it holds approx 1.3 fl oz lamp oil), a natural marble Winelight and Flame Protector. The Winelight fits in the glass tube and allows you to use the tube in a bottle that already has contents, example: imported olive oil (The two oils will never mix so you can still use the olive oil and it makes a great kitchen candle), in bottles with sand paintings, or just in a bottle that you do not want to fill completely with oil. The tube can also be pushed into Floral Foam and become part of a floral arrangement. The tube lamp will burn approx 5 hours before it needs to be refilled.