Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5398911.
Brighten up your fridge with some cheery flowers or a succulent plant with this fridge magnet vase. The model prints without supports and is water tight (at least mine was in PETG). Should work in any filament but if you have trouble with getting it water tight you can print in PETG or ABS and use some acetone in the inside to seal it (acetone is mildly toxic so do so in a well ventilated area)
I trimmed an old sheet magnet to match the shape and then superglued it to the back of the vase. In the pictures the vase is full of water and it is holding quite strongly.
I have included the Fusion 360 archive file in case you would like to tweak the design. If there is another format that would be more helpful let me know, I would like to start sharing design files along with the stl but don't know what formats are most useful.