Here in Washington state recreational pot is legal. One problem with vaping cartridges is they have no labels (too small and they get hot while in use). After we got 2 or 3 we’d end up asking each other “Which one is this again?”. They also should be stored upright.
We got frustrated enough to come up with a really simple box to organize the cartridges and keep them upright. My wife is a former graphic designer so she put our idea into design really quickly (only needed 1 trial before a final design).
The box is maple plywood. Assembles in 30 seconds. It’s perfectly stable on its own but we also glued the bottom tabs into the slots to make it super solid. The top we left removable in case a cartridge falls inside. We’ve had a bunch of friends get excited so we added numbers to the tab/slot pairs to make it brain-dead easy to put together.
Already working on getting it up on Etsy! 
I assume you have a key??
)