When I started smoking cannabis in college none of my friends were discreet about it when we would be out driving in cars. I had one friend who would literally smoke his bong while driving his car around the city. I was constantly paranoid the cop would drive by and see what we were doing, pull us over, and arrest us all. Because honestly 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 worried because I was in college and going to school 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 college 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 device was for common use. Now that I can shop at legal cannabis dispensaries, I purchased the marijuana oil pens that have tanks filled with cannabis oil. They are very discreet and can be used in a lot of locations without looking obvious. Some of them resemble nicotine vaporizers for instance.