Quote Originally Posted by Reefer Rogue
That means the bubbler has the most effective Thc transfer rate.

Hmm, it said it did slightly better... I dunno now.

Maybe the vape is better, then joint then bubbler then bong... i dunno
Dont pay too much attention to those THC Transfer rates.. any study that proposes results from old data without explaining methodology should be discounted. They left out alot of factors when testing the transfer rate, and the experiment should be completely redone with new methodology.