One Trip Containers (One Trippers)
One trip containers, also known as “like new,” are typically one or two years old, in excellent condition with minimal damage. They cost about double that of wind and water tight containers but are ideal if you are concerned about appearance and condition.
Cargo Worthy Containers (CWO)
Cargo worthy containers, CSC certified for overseas shipment on container ships, are wind and water tight but may have some surface rust due to their steel manufacture and exposure to the elements. CWO units may have some dings and dents; however, they are a step above wind and watertight containers.
Wind and Water Tight Containers (WWT)
Also known as wind and watertight containers, these come with working doors and are guaranteed not to leak. They likely need some cosmetic work, however. Considered the lowest cost containers, these are ideal for those who just need storage solutions and plan to pressure wash and paint them prior to use.