Made of durable, solvent-resistant plastic for use with oils, acrylics, or watercolors, these bright white, plastic palette trays have several round wells, plus slanted wells that allow water or thinner to collect away from the paint. Jack Richeson & Co. offers a broad selection of trays and palettes to appeal to professionals, students, and even children. Of course, we always consider the environment at Jack Richeson & Co., so we use recycled plastic where feasible and grind and recycle all plastic waste. 20 Well Tray: A tray that offers both large and small mixing wells with rounded edges that will not harm brushes. Easy to clean.