No more wasted paint. This Sta-Wet keeps acrylics and other water-based paints moist on the open palette for hours. Once the lid is closed, the paints will stay in workable condition for days, even weeks. A unique sponge and special permeable palette paper provide the paint with a constant source of moisture. This convenient 8-1/2" x 7" palette comes with five disposable palette sheets and a sponge, plus a top cover that provides air-tight storage.