At Four Sons Logistics, we help you make sense of shipping container grades so you can choose a unit that’s cost-effective, durable, and tailored to your needs whether you’re storing, modifying, or preparing for cargo transport.
We offer high-quality shipping containers that have passed rigorous checks for structural integrity, weather resistance, and performance in harsh conditions. Whether you’re a business, builder, or reseller, we’ve got the container that fits your project.
Understanding grades of shipping containers is essential when purchasing. Here’s what you need to know:
Need help comparing WWT vs. Cargo-Worthy CQ containers? We’re here to guide you through every detail.
Our containers are manufactured by trusted suppliers in China and tested to perform under harsh conditions — ensuring your goods stay protected no matter where you ship.
We offer standard sizes and high cube containers for extra vertical space, perfect for bulk storage, custom builds, or shipping oversized items.
Not sure which grade is right? Whether you’re looking for cargo-worthy CQ, wind and water tight (WWT), or something in excellent condition, we’ll make sure you get exactly what you need — no guesswork, no surprises.
Request a Quote Now Or call (619) 349-4040 to talk to our container specialists.
Open Top Containers
For oversized or top-loaded cargo
Side Opening Containers
Easy loading/unloading access
Reefer (Refrigerated) Units
Temperature-sensitive storage
Double Door and Custom Build Containers
Wind and Watertight (WWT) containers are secure against the elements and perfect for on-site storage. Cargo-Worthy (CWO) containers, on the other hand, are structurally sound and certified with a valid CSC plate, making them suitable to ship goods internationally. If you need to transport cargo across borders, go with Cargo-Worthy.
No. WWT containers are ideal for domestic storage and shipping but are not certified for cargo transport internationally. Only Cargo-Worthy containers with a valid CSC plate can be used to legally and safely ship goods overseas.
Used containers will typically have some wear and tear, such as minor dents, scratches, or surface rust — especially if they’ve been exposed to harsh conditions. All containers we sell are thoroughly inspected and graded to ensure you know exactly what you’re getting.
Most of our inventory is sourced from reputable manufacturers in China, known for producing high-quality containers that meet global standards. We only partner with trusted suppliers to ensure long-lasting durability and performance.
We offer a wide range of sizes including standard 20ft and 40ft, as well as high cube options for extra storage height. Grades available include:
Yes! Four Sons Logistics can arrange delivery directly to your location. We also offer flexible leasing options and expert advice for anyone looking to transport cargo, build custom structures, or store equipment long-term.
Need help figuring out the right shipping container grade? Our team at Four Sons Logistics is here to help. Request a quote or speak to a container expert today!
