A simple box for two 18650 batteries and one 10ml liquid bottle.

Just print 2 pieces of it and it will fit together, you also need 8 neodym
magnets with 5mm diameter and 2mm thick to glue it into the holes.

If you just need 1 spare Battery with you, you also could use the place for the 2nd one
for coils and stuff.

I also like to put texts on it via the slicer.

easy and fast to print