It wasn’t a cartridge filled with marijuana oil, it was a small oil and concentrate pen that had a metal coil inside a ceramic chamber.
When I started smoking cannabis in university none of my friends were discreet about it when we would be out driving in cars. I had 1 buddy who would literally smoke her bong while driving her vehicle around the city. I was consistently paranoid the cop would drive by and see what we were doing, pull us over, and arrest us all. Because absolutely if you did something like that it was a lot worse than just getting pulled over for being above the legal limit on alcohol. Back then my state did not have legal cannabis in any form and you would get both a possession charge for cannabis and a DUI charge for driving under the influence of a controlled substance. I had lots of reasons to be sad because I was in university and going to university full time. I didn’t want to get in trouble with the law and have that somehow affect my ability to stay at my university. At some point towards the end of university I got to experience a marijuana oil pen for the first time. It wasn’t a cartridge filled with marijuana oil, it was a small oil and concentrate pen that had a metal coil inside a ceramic chamber. It could be loaded with most forms of cannabis concentrates. I loved how discreet that unit was for common use, then now that I can shop at legal cannabis dispensaries, I purchased the marijuana oil pens that have tanks filled with cannabis oil. They are absolutely discreet and can be used in a lot of locations separate from looking apparent. Some of them resemble nicotine vaporizers for instance.