Kids love to paint, and like all art, it's therapeutic. These cups make painting very easy on the parents. The screw on lid will not accidentally come off, so spills are eliminated. And because the seal is airtight, the paint can be left in the cups without drying out! That means you can buy paint in cheaper large bottles, pour smaller amounts into the cups, and eliminate the chore of washing the cups in between. You can just leave the easel set up, with a splash mat under it, and painting becomes no big deal. Set of four, with colored lids (red, green, yellow, blue).