This smaller assortment of Paint Pucks is the perfect size for gift-giving, small classes, or your family studio! All kinds of assorted colors! Common Rinse Cup habits used to include smashing brushes against the smooth, uncaring sides and bottom. Water alone quickly becomes hopeless in freeing unwanted paint from your brush, and after minutes of brush abuse, you'd finally feel confident to get going with a new color. * Smart Paint Brush Cup Insert – This small, versatile fits into Mason jars, paint brush cleaning jars, and cups to make cleaning and washing off brushes simple and easy. * Suction Cupped Bottom – Each oil paint brush cleaner also features a suction cup on the bottom to keep them safely in place on the bottom of glass or plastic rinse jars.