Cannabis

is excellent. They have a less expensive model (non-digital) that works just as well. The bag is large but holds the vapor until you require it. It is far cleaner then smoking and the vapor is not at all like the smoke that stinks up the place. Can be used with oils. It is VERY expensive but captures 100% of product so can save costs in that end. Also, very easy on the lungs, the main reason my friend uses it.