The Daler-Rowney Stay-Wet Palette is a simple but highly effective idea: it keeps your acrylic paints moist & useable for weeks, reducing waste. You simply soak the sheet of reservoir paper at the bottom of the palette with clean water, & dampen the greaseproof paper above it. Then get painting, using the greaseproof sheet just as you would any other palette. When you’re finished for the day, close the clear lid, & the paint is kept moist by a simple process of osmosis that draws water up from the reservoir as it’s needed. This small Daler-Rowney Stay-Wet Palette measures 254mm x 279mm x 25mm & comes with three sheets of reservoir paper & 12 sheets of greaseproof membrane paper (replacements are available separately).