Australian slang for a cannabis smoking device similar to a bucket (or "gravity bong") this device involves a 600ml bottle or at maximum a 1.25litre bottle with a small hole cut into the bottom and a cone piece
melted into the lid of the bottle. The bottle is then filled with water and the lid/cone piece screwed on
top, then you hold a lighter above the cone and release your finger from the hole in the bottom, when the water flows through the hole in the bottom and drains from the bottle the air pressure pulls the cone and fills the bottle with smoke, afterwards you unscrew
the lid and breathe in through the lid of the bottle.