This tank has a spiral coil insert that cleans between bristles and a screw cap that prevents evaporation.
Silicoil Brush Cleaning Tank Jar : Home & Kitchen
Tank Brush, 8.1, Stiff, Blue 70373
Lion Silicoil Brush Cleaning Tank - 12 oz jar
Silicoil Brush Cleaning Tank, Winsor & Newton
Silicoil Brush Cleaning Tank, Winsor & Newton
Silicoil Brush Cleaning Tank Set
Cheap Joe's 2 Minute Art Tips - Silicoil Brush Cleaning Tank
Brush Cleaning Tank Jar – Odd Nodd Art Supply
Silicoil Brush Cleaning Tank, Winsor & Newton
Brush Cleaning Tank, Hobby Lobby