This clear, thick glass "tank" has a spiral coil insert that effectively cleans between brush bristles and a screw cap that prevents evaporation. To clean oil paint off of brushes simply fill the tank with a brush cleaning fluid, like Silicoil Brush Cleaning Fluid, and stroke brushes across the smooth aluminum coil. This exposes oil colors in the brush to the fluid's cleaning action. This allows for less cleaning fluid to be used when cleaning brushes thereby creating less waste.
The tank may be used with acrylic and other water-based colors but with clear water and not Silicoil Brush Cleaning Fluid.