Bongs - Learn to make a Gravity Bong
Bongs - Learn to make a Gravity Bong

 

 

The gravity bong is an unfiltered lungful. Grab a big bottle, like a 1litre/2litre bottle. Hold it upright (bottle neck on top) and make a hole, as wide as a biro-pen, just on the bottom edge of the bottle. Put the bottle aside and make or affix a pre-made 'cone' with 'mix' onto the top of the bottle. Be sure that the 'cone' will make an air-tight seal around the opening.

Bongs - Learn to make a Gravity Bong

Fill the bottle with water and place a finger over the hole you made in the bottom, to prevent the water emptying too soon.
Put the 'mix cone' on the mouth piece of the bottle and apply a flame to the mix. Then remove your finger from the hole at the bottom of the bottle (keep the flame applied to the 'mix' until, either the mix has burnt through or there is no more suction), and let the water pour out (over a sink or something). You'll notice that, as the water flows out of the bottle, the smoke produced from burning the mix, is drawn into the bottle-chamber. Once all the water has emptied the bottle, quickly remove the 'mix cone' and inhale the smoke inside the bottle-chamber. Voila!

 
Bongs - Learn to make a Gravity Bong