How does the vaporizer work?
My living, ex brother in law and I built a pipe in which the (really expensive) pot, or, hash was put in a test tube with a stopper that had two openings, one for incoming air and one that went to a hooka. An alcohol lamp was put under the test tube and adjusted to heat the drug just up to the point of combustion. When you drew on the hooka, enough oxygen was introduced to start combustion, which stopped when you stopped toting. The little bit of extra smoke was trapped in the test tube. No waste!