Quote Originally Posted by moorephened
What is the purpose of the smaller hole in the cap next to the pentube-hole?
When you suck out the air that's in there, more needs to come in, so fresh air comes in that hole when smoke goes into your lungs.
pu ekot Reviewed by pu ekot on . How to make a vaporizer http://www.youtube.com/watch?v=oEiJaHlUpyE&NR thought id show u all this pretty phat im gona ave 2 make 1 :cool: Rating: 5