This method is also known as the "third lung", the "bucket" or from time to time the "parachute". This is sampling done by taking a two liter soda bottle, emptying it and removing the underneath partially of the bottle with shears or a knife.
A large plastic bare is then put in excess of the bottom partially of the jug and put in place with close ribbon or a rubber band. Cutters are then used to obtain and push through the white top of the bottle and thereby creating a little hole - just great enough to put a bowl in.
The artificial bag is drive into the bottle and the material is placed into the bowl. The cannabis is burned the smoker grabs out the plastic bag and pulls it out. This thereby makes the smoke strained into the bottle and prepared to be smoked.