Every container listing you will see uses one of four grade labels: IICL, CWO, WWT, or As-Is. They aren't marketing fluff — they map to specific physical condition tiers that directly affect price and what the box is good for.
The four grades
IICL — the new car of containers
IICL containers are inspected to the International Institute of Container Lessors specification. In practice: one-trip boxes that have crossed the ocean once from the Chinese factory. Square doors, minimal dents, clean wood floor, factory paint. If you are doing a container home, a container shop, or anything cosmetic-sensitive, this is your grade.
CWO — Cargo Worthy
CWO is the working standard for commercial shipping. The container has been surveyed and certified to still be safe for international ocean shipping. Typically 8–15 years old, some rust and dents, but structurally sound and will take another ocean crossing. Good middle ground for construction site storage.
WWT — Wind & Watertight
WWT is CWO's cheaper sibling. Same dry-storage function (your stuff stays dry), but hasn't been surveyed for ocean-shipping certification. Typically the best value for on-site storage, farm use, and residential backyards.
As-Is
As-Is means exactly that. Usually cheapest by $400–$800. Expect some holes, a door that doesn't latch perfectly, or a roof that pools water. Fine if you are cutting it up for a modification project. Not fine for storage.
