The paint tub has two parts: one part is for holding paint and rolling off excess paint from the paint roller, and the other part is for storing rollers and brushes. With this tub, it is convenient to take everything you need at once, for example to a ladder or a higher platform. The paint tub is very stable even if you use a roller with a telescopic handle and press it hard to remove excess paint.
With disposable film contents, you can reuse the dye bath without having to wash it in between.