Oil Pens - Rubi
I picked one up after watching Bud's review and immediately filled it with some honey-consistency oil one of my medical dispensaries packs in little glass syringes. It works, but if you can thin it out just a little bit with propylene glycol or terpenes (which is what I'm seeking out) I think it would draw a bit smoother. So far no burnt taste with the thicker liquids though, its just a bit hot/harsh if I draw for more than 4 or 5 seconds. My throat gets toasted fast though.
Also... with honey I wouldn't use it right after filling as the oil need some time to get down to the goods. I filled my cartridge (about half way as I was nervous about the consistency myself) and put the cartridge in the Rubi, the I let it stand upright in for about 30 or 45 minutes to let all the material flow to the bottom before priming (remove the cartridge and draw a handful of times) and using per the instructions.