Staples offers Staples 30 Qt. Black Durable Expanding Folding Crate on Wheels (31272) for $14.99 (orig. $29.49) with free shipping.

Product Description:

Take items on the go with this expanding wheeled folding crate. This crate can hold up to 70 pounds and has 1.7 cubic feet of space, so there's plenty of room to carry assorted items, while the lightweight plastic and aluminum construction offers durability and easy portability. This Staples wheeled crate folds flat when not in use, minimizing the amount of storage space required.

• Great for organizing the home and office
• Black and made of aluminum/plastic
• Open lid simplifies access
• 30 qt. capacity
• Dimensions: 16"H x 18.5"W x 15"D
• Storage capacity of 70 lbs./1.7 cu. ft.
• Contains one per pack
• Versatile and mobile solution for carrying a variety of supplies
• Heavy duty wheels for easy transporting, locking adjustable handle
• lightweight and collapsible, folds flat for storage