Paint mixing cups are a silly thing to get excited about, but these things are great. They're cheap, but they're sturdy enough to be cleaned and reused many times. I've had a stack of these for quite a while, and I don't think I've thrown any out yet. I especially like the handy pour spout, as well as how the whatever-they're-called things that keep them from stacking too tightly are on the outside so they don't interfere with mixing and cleaning. Seriously, just buy them. Better yet, buy a bunch.

I use these all the time when airbrushing they make measuring the paint so easy and they clean up so good I'll have them for years

These cups make mixing paint great and has the measurements on the side to help with ratios. Also like how they have a spout for east pouring into you airbrush cups.