Understanding Shipping Container Grades: WWT, Cargo Worthy, and One Trip Explained
One Trip, Cargo Worthy and Wind & Watertight describe real differences in a container's condition and what it's suited for. Here's how to pick the right one.
Terms like [One Trip](https://www.eveoncontainers.com/en-US/new-one-trip-shipping-container), [Cargo Worthy](https://www.eveoncontainers.com/en-US/cargo-worthy-shipping-container), and [Wind & Watertight](https://www.eveoncontainers.com/en-US/wind-and-watertight-shipping-container) describe real differences in a container's condition and what it's suited for. Knowing them helps you buy the right one.
## What Grade Means
Every shipping container on the market started the same way: an ISO-standard steel box built to carry cargo at sea. Grade describes the condition the container is in after it retires from active shipping service and what level of use it's certified or suited for after that. Grade affects price and determines what a container is appropriate for. Buying based on the name alone, without understanding what the grade actually guarantees, is how buyers end up with a container that doesn't match their project.
The Three Grades
| | **One-Trip** | **CW (Cargo Worthy)** | **WWT (Wind & Water Tight)** |
| ----------------------- | ----------------------------------------------------------- | -------------------------------------------------------------- | --------------------------------------------------------------- |
| **Structural standard** | Single voyage from factory; minor cosmetic wear only | Meets a stricter inspection standard for active shipping and handling | No visible daylight through walls, roof, or floor; structurally sound |
| **Floor condition** | Clean, no patches or delamination | Free of delamination and holes | May show patches or limited delamination |
| **Typical use** | Conversions, offices, retail, any use where appearance is a priority | Storage plus active transport, lifting, or stacking under load | Static storage, workshops, conversions |
| **Sold by Eveon?** | Yes | Yes | Yes |
<br>
Of the three grades, One Trip containers are the highest condition and the highest price. WWT and Cargo Worthy are both sound, usable containers, but they're suited for different things after the sale. A Cargo Worthy container meets a stricter inspection standard that qualifies it for active transport, lifting, and stacking under load again. A WWT container is appropriate for storage and limited inland movement but isn't intended to re-enter active international shipping.
## What We Stock and Why
Eveon's inventory is built around three grades: Wind & Watertight, Cargo Worthy, and One Trip.
**Wind & Watertight** is our core grade and the right fit for most customers. Every WWT container we deliver meets that standard and is backed by our Limited Lifetime Warranty on purchases.
**Cargo Worthy containers** are available in a growing number of locations for buyers who need a container that can re-enter active transport and be lifted and stacked under load. Our Cargo Worthy containers are sold without a CSC plate, so a container headed overseas needs CSC certification from a third-party marine surveyor first. Learn more on our [Cargo Worthy containers page](https://www.eveoncontainers.com/en-US/cargo-worthy-shipping-container).
**One Trip containers** are the newest addition to our lineup. A One Trip container has made a single voyage from the factory to a US or Canadian port before being sold, which means you get a clean, straight steel shell in Ivory or Mouse Grey with none of the dents, patches, or surface rust that accumulate over years of ocean service. You may notice minor scuffs or marks from loading and transport, but the condition is the closest to factory-fresh that the used market offers. One Trip containers are available to purchase only, in 20ft and 40ft High Cube configurations, at select locations in the United States and Canada.
## How to Verify a Container's Actual Condition
Grade names are a starting point, not a substitute for looking at the container itself. At delivery, you and the driver inspect the unit together, checking for daylight through the walls or roof, floor condition, door hardware, and seal integrity, then complete an inspection form before signing for acceptance. Our [guide on inspecting a used shipping container at delivery](https://www.eveoncontainers.com/en-US/news/market-insights/how-to-inspect-a-used-shipping-container) walks through each step.
Surface rust, dents, patches, and faded paint are normal on any used container and don't affect structural performance or wind and watertight condition on their own. What you're confirming at delivery is the specific structural and seal integrity that your chosen grade is supposed to guarantee.
Shop Used Shipping Containers
40ft Used High Cube Container
Dimensions
Length
40'
Width
8'
Height
9' 6"
Shop One Trip (New) Shipping Containers
Frequently Asked Questions
- Yes. A one-trip container has made a single voyage from the factory, usually overseas, to a US port before being sold. It has minimal wear. No container sold on the secondary market is, strictly speaking, brand new.
- Both are sound, usable containers. WWT means the container is structurally sound and keeps out wind and water, which is sufficient for storage and most conversion projects. Cargo Worthy meets a stricter standard that qualifies the container for active shipping, lifting, and stacking under load.
- Yes. Cargo Worthy containers meet a stricter inspection standard than WWT, which makes them appropriate for active transport, lifting, and stacking under load. Eveon's Cargo Worthy containers are sold without a CSC plate, so for overseas shipping you'll need CSC certification from a third-party marine surveyor. If you need a container for ongoing shipping operations, Cargo Worthy is the grade to look at.