You can also do a butane extraction of the THC left in that vaped bud, which can result in a super pure butane hash oil (BHO) that is also suitable for vaping.

You can also do a butane extraction of the THC left in that vaped bud, which can result in a super pure butane hash oil (BHO) that is also suitable for vaping. I say can because most butane has horrible additives (unlike the quintuple refined stuff you can buy at headshops), and the materials used in the extraction are also important (e.g. if you use a PVC pipe, the butane extracts some of the PVC as well -- I've known people who did this and smoked/sold the product out of ignorance). The whole operation is typically dangerous/flammable and releases some butane into the environment/unprotected-respiratory-system, unless you have a shwanky machine that cycles and reuses the butane. This comment isn't a how to guide, I'm just trying to note that while buying oil you don't know the origin of can expose you to crazy additives somebody who does their research can make their own BHO that is damn near 100% plant material once the quintuple refined butane evaporates away. It's not that hard, though it is either expensive or dangerous depending on the materials used.