Hi y'all! New FC user here...longtime lurker and vaporist. Back when I purchased my first vape, the Vapolution, I was doing the research and found this: 30% - 40% of the THC is exhaled in a clinical study using the Volcano. This info is from: http://en.wikipedia.org/wiki/Vaporizer It states: "The Leiden University study found that as much as 30%40% of inhaled THC was not absorbed by the lungs but simply exhaled. However, they did not find large individual differences in the amounts exhaled. Users may therefore improve efficiency by breathing several times in and out of a bag after a serving." So, I've tried (when feeling like I need to conserve) exhaling into a bag (or balloon for a punch!) to then take a second sip/rip and I imagine that I am receiving more of the THC and perhaps CBD's, CBN's by utilizing this method? It's good to be here!