Watercolor is a fun medium because you are taking pigments and rehydrating them always, dries fast, quick cleanup. These brush washers help by giving you a constant stream of clean water. But what happens if you keep those discarded pigments & try to reuse them? You get a beautiful neutral brown-grey with granulation and sometimes sparkle by obly dumping the water and letting the pigment collect. You can strain into a jar an add mediums like gum Arabic as well! I have linked my “watercolor toilet” and other supplies for you LTKHome LTKOver40 LTKFindsUnder50