A simple box enclosure that accepts a 12v 3mm ID 5mm OD peristaltic pump i bought from AliExpress. I'm using it to automatically water houseplants.

I consider this a work in process, but the geometry of the section that accepts the pump is accurate enough for this to be a usable design

The two holes at top will accept 6#-32x6 screws, which are the phillips/hex screws frequently used on PC cases, so you might already have some.

Model prints upside-down with supports for the pump bracket cutouts and arch.