THC & CBD pre-filled oil cartridges became super-popular in the recent year, and are currently the most popular way to vape Cannabis for medical or recreational purposes.
Vaping THC oil doesn’t require a high powered vaporizer, making these Vape Pens small, light, relatively cheap, and very discreet. There is no learning curve, usually nothing to fill (pre-filled 510 cartridges are available in dispensaries), and the results are very consistent. You can vape as much or as little at a time, and there is a huge variety of flavored oils with varying amounts of THC and CBD.
Most Oil vaporizers on this list work with pre-filled 510 cartridges, and some with refillable cartridges. 510 is the standard thread that connects the cartridge to the vape pen. Other ways to vape weed include dry herb vaporizers or vape pens for wax & dab.