This is something you could leave in your pen jar on your desk and no one would be the wiser. Or if you are going for a few discreet puffs before an important meeting you could even be carrying it in your hand and people would think you just stopped to sign a few contracts.
Will it work with your cartridges? As long as they are the slim 510 cartridges (the most popular on the market), the answer is yes. Anything that will fit on an pen vape, or o.pen vape, will work perfectly. Some brands that have been tested are O.PenVape, FlavRx, and American Flower.