This is a USC36175 QT Mixing Lids. USC Painter'sPail 1Qt Mixing Cup Lids, 100/box. Now with new ratio measurement. For easy mixing & measuring. Tough high density polyethylene. More durable than bleached paper pots (reusable) Sturdy side walls, with visible liquid level, readable from inside or outside. Solvent resistant, seamless construction. US & metric measure.