US Patent 7854341 Paint tray system

A paint tray system has a paint tray with an upper circumferential land having an upwardly projecting dowel at each corner. A paint tray liner has a medial portion substantially conforming to an inside surface of the paint tray and a peripheral liner lip extending over the land. The liner lip has four corner holes receiving the four corner dowels. A paint tray lid has a peripheral lid lip extending over the land, the lid lip having four corner holes receiving the four corner dowels.