A 40ft used shipping container — also called a 40-foot conex box, conex container, or cargo container — is a pre-owned steel storage unit you own outright, delivering maximum capacity at the lowest upfront cost. At roughly double the floor space of a 20ft unit, it is the workhorse size for warehouses, construction yards, and large-scale inventory.

Are used 40ft containers still reliable? Yes. Each unit is thoroughly inspected to verify operational doors, intact flooring, and tight seals before delivery. Built from corrosion-resistant Corten steel to ISO standards with marine-grade plywood flooring and reinforced cargo doors, used containers protect gear just as well as new ones — with honest cosmetic character from prior shipping service.

Expect minor dents, scuffs, surface rust, and original shipping line markings. None of it affects performance. Ideal for manufacturing overflow, agriculture equipment, logistics staging, automotive storage, construction materials, and custom conversion projects. Units ship in stock for nationwide delivery, giving you secure steel storage on a timeline that matches project deadlines without waiting on custom lead times.

Buy your 40ft used shipping container online now while it is in stock, or rent this size from $139/month — both delivered in 3-7 days across the US. Pricing, specs, and FAQs are in the product tabs.