Used Container Grades Explained: WWT, CW, AS-IS, One-Trip

When shopping for a used shipping container, you'll often come across grade classifications like WWT, CW, AS-IS, and One-Trip. For first-time buyers these terms can be confusing — but understanding them is crucial for making the right choice. At YES Containers, we help customers across the U.S. find containers that fit their budget, site conditions, and intended use.

This guide breaks down each grade, explains what it really means in practical terms, and shows you when to choose one over another.

Why container grades matter

Not all shipping containers are equal. Containers are built tough, but years at sea expose them to dents, rust, and wear. Grading gives you a snapshot of a container's condition so you know exactly what you're buying. The grade affects:

• Durability — how long it will last outdoors in your climate
• Cost — higher-grade containers come at a premium but last longer
• Appearance — some look nearly new, others show heavy use
• Certification — some grades are valid for active cargo shipment, others only for storage

Choosing the wrong grade can leave you with unnecessary costs — or a container that doesn't meet your needs. Always check condition on delivery using our inspection checklist.

The main grades of used shipping containers

1. One-Trip (like new)

• Definition: Manufactured overseas and used just once to ship cargo to the U.S.
• Condition: Nearly flawless — fresh paint, sound structure, minimal dings.
• Best for: Customers who want maximum lifespan, best appearance, or a customer-facing installation.
• Cost: Higher than used grades, but with decades of service life ahead.

2. WWT (Wind & Water Tight)

• Definition: Retired from cargo use but guaranteed to keep out wind and rain.
• Condition: Visible rust, dents, and faded paint are common — but the container is secure and weather-tight.
• Best for: On-site storage, workshops, or any application where appearance doesn't matter. Our most popular grade for storage solutions.
• Cost: Affordable and practical for most storage needs.

3. CW (Cargo Worthy)

• Definition: Certified structurally sound and capable of carrying cargo internationally.
• Condition: Stronger structural integrity than WWT, but still shows age and use.
• Best for: Businesses needing containers that can be loaded, lifted, and shipped. Required if you need a seaworthy certification for international transit.
• Cost: Slightly more than WWT, still below One-Trip.

4. AS-IS

• Definition: Sold in current condition with no guarantees on weatherproofing or structural integrity.
• Condition: May have holes, heavy rust, or damaged doors — not suitable for weatherproof storage without repairs.
• Best for: Scrap use, creative projects, or buyers planning to repair. See our guide on repairing damaged shipping containers before going this route.
• Cost: Lowest price, but highest risk — factor in repair costs before committing.

Container grade comparison

Choosing the right grade for your needs

Ask yourself three questions before ordering:

1. What's the purpose? Export or active shipping requires CW or One-Trip. On-site storage only? WWT is the practical choice. Short-term or tight budget? AS-IS can work if you're comfortable with repairs.
2. What's your budget? One-Trip containers cost more upfront but pay off over decades of service life and hold resale value better than WWT. For most residential and small business buyers, a used 20ft WWT container hits the best value sweet spot.
3. Does appearance matter? Customer-facing sites — retail pop-ups, offices, event spaces — warrant One-Trip or CW. Backyard storage or construction sites? WWT is cost-effective and does the job.

Pay on delivery — buy with confidence

One of the most common concerns we hear is about payment security when buying a container sight-unseen. YES Containers offers a pay-on-delivery option on qualifying orders — you only pay when the container arrives on your site. No upfront risk, no surprises.

FAQs: used container grades

Q: How long will a WWT container last?
A: With proper care — level placement, touch-up paint, good drainage — many WWT containers last 10–15 years outdoors.

Q: Can AS-IS containers still be repaired?
A: Yes, many can be patched or reinforced. But repair costs can add up fast — read our container repair guide to understand what you're getting into before buying AS-IS.

Q: Are Cargo Worthy containers better than WWT for storage?
A: Both are secure for storage. CW is structurally stronger, but if you don't need international shipping certification, WWT gives better value for static storage use.

Q: Why are One-Trip containers worth the higher cost?
A: Decades of service life, higher resale value, and near-new appearance. For businesses with a customer-facing setup or long-term investment horizon, the premium is worth it.

Q: What grade do I need for international shipping?
A: Cargo Worthy minimum — and depending on the route and cargo, you may also need a seaworthy certification.

Final thoughts

Buying a shipping container doesn't have to be confusing. By understanding grades — WWT, CW, AS-IS, and One-Trip — you can make a purchase that fits your budget and your actual use case. Browse our available containers, check our current container pricing guide, or get a quote today. Have questions? Call us at (800) 223-4755.