Those are paint bottle holders, and they aren’t convenient to use on the workbench where space is at a premium. I made paint bottle holders by drilling holes for Floquil and Poly Scale in a 1x6 and laminating another 1x6 for the base. I’ve also used 2x4s, drilling holes with an auger bit and a brace, and since you don’t drill all the way through, there’s no need for a separate base. The rest of my paint bottle collection is stored in tops of printer paper boxes, which serve as nice flats that can be placed in drawers.

Nelson Moyer