The Progressive 4-Quart Flour Prokeeper has a high quality construction with A silicone seal For air tight storage. Each container has measurement markings that clearly display the remaining flour, and a leveling bar clips across the bin for easy, mess free measuring, or it can snap and store under the lid. Easily holds a 5-LB bag of flour with room to spare. Measures 8L x 6.5W x 8.25H.