A+ Water Cup for Painting

This is a hard-to-knock-over water cup for your brushes. At the bottom of the cup are nubs? nodules? bumps? that agitate the bristles to get them squeaky clean. It's only been tested "in the field" since Jan 2026, but so far they've been great.

I took @Retro_Revival_EU's "Unspillable Liquid Container as inspiration to build my own water cup for students to use in class for their painting projects. The best cup design to date had been the Yoplait yogurt cup, so a little of this, a little of that, bam.