Mr. Metal Ball GT73

I was skeptical that 60 little balls would make a difference, but my paint came out smooth after a good shake. The only reason it's not 5 stars is that a few of them are stuck together in the bag, which is annoying to separate.

Tossed a handful into a half-empty bottle of latex and it mixed way faster than my old stirring stick ever did. The 60 count gives you plenty of spares for future projects. Just wish they came in a resealable pouch instead of the plastic bag they ship in.