Progressive flour ProKeeper features a silicone seal for airtight storage. The removable leveller snaps into the lid for easy storage. Measurement marks clearly display remaining flour. Holds up to 5 lbs. of flour with room to spare. Hinged lid flips to easily fit in the dishwasher. The materials used are ABS, SAN, polypropylene, silicone and stainless steel. It is dishwasher safe. The capacity of the container is 4 quart (3.7 Litres).