Head over to Walmart for a sweet deal on extra storage bins. These Sterilite 18-Gallon (72-Quart) Storage Box, Set of 8 are priced for is $35.68! Opt for in-store pick up to save on shipping, or spend $50 to also get free shipping! Its like paying $4.46 for each one!
They also come in Grey for $38.97. HERE
They have snap on lids, and measure 24"L x 18"W x 16H".