I have a problem with getting a lot of change in coins and not being able to get rid of them.
So I decided to design a money bank to keep all those coins in and because I am a gamer at heart why not have it be potion shaped? After some tinkering in my CAD software I had a potion shaped container and a slot to put money through.
The coin slot is 30mm by 3mm and I derived those measurements from a 2€ coin.
The coin slot (or cork as it is called in the files) has a nice friction fit in the top, but be careful not to push it in too far as it can be quite difficult to pull it back out again.
Should you decide to sand the cork down or print it smaller there is a little ledge in the vial to prevent the cork from falling into it.
I printed the cork in a bronze PLA filament and the vial in a semi-transparent PLA.
I used a 1.0mm nozzle, but any nozzle size is fine.
I recommend a high infill for the vial as the walls are only about 2mm thick on average.