Unique sponge and permeable paper allows your paints to have a constant source of moisture. This fabulous stay-wet palette is designed to keep your water-base paints from drying our while in use or storage. NO MORE WASTED PAINT!. Acrylics and water-colours will be easier to work with because they will stay moist for hours, even in the open air. Snap the lid on and the paint wil stay fresh for many days. The 20cm - 1.3cm X 18cm X 2.5cm high palette and lid is crafted from impact resistant plastic. It comes with 5 disposable liners, a cellulose sponge, the palette tray and lid. Included are instructions for preparation and use.