Dry Herb Vaporizers are used with a variety of herbal medications. These work great to extract the essential oils as a vapor to inhale. The leftover material is still useable for edible or tincture infusion, since it still retains about half the cannabinoids it started with. This is much better than combustion since it only extracts what you want from the product and you can utilized all the cannabinoids, while with combustion, half the cannabinoids are left in the burning smoke and ash.