Small pipe.

Pack that bowl, cover it with keif.
Light up 1/4 of bowl with flame.
Pull on it, but let the flame die, keep pulling and if you get it right, by the time your lungs are full, the cherry is out. Keep moving over to the green. Your last hit should be green. Zero wasted smoke. Do one of those every 5 minutes and you will be stooooned. When i smoke bowls i never run out.