Magical Boxes – The 20FT And 40FT High Cube Sea Container

There’s something almost magical about the simplest ideas. Take the humble sea container: a steel box, standardised in size, stackable, durable, and endlessly reusable. On paper, it’s not revolutionary. In practice, it has quietly reshaped the entire world.

Before containers, shipping was slow, messy, and labour-intensive. Goods were loaded piece by piece, crate by crate, with delays at every port. The introduction of containerisation changed all of that. Suddenly, cargo could be packed once, sealed, and moved seamlessly from lorry to ship to rail. It made global trade faster, cheaper, and far more efficient—shrinking distances and connecting markets in ways that once seemed impossible.

For me, this transformation isn’t just something I’ve read about—it’s something I’ve lived alongside. As a young boy, coming with my father in the school holidays, I remember visiting our London Docklands site in E14. Back then, the rhythm of the river Thames defined everything.

We used to swim in it, jumping off the barges which we loaded with our own cranes, right there on the water. Those barges would be tugged through the old Kingsbridge which used to swing open and let vessels pass into Millwall Dock. From there, cargo would be transferred onto ocean liners bound for destinations across the globe. It was hands-on, physical, and full of fun times and character—a world very different from today’s streamlined logistics.

And yet, in many ways, the spirit of that era lives on—just in a more refined form. Sea containers have brought order and flexibility to self-storage industry in the same way they revolutionised shipping. At Store That in Canary Wharf, E14, they’ve become a valuable addition to our self-storage offering. Strong, secure, weatherproof, and accessible, they provide a simple solution that just works, so we hold both 20ft and 40HC containers on site and make it really easy to access them, even with HGV’s.

What’s striking is how popular they’ve become. Businesses love the practicality—easy access, generous space, and the reassurance that their goods are protected. Individuals appreciate the simplicity: no fuss, no complications, just reliable storage when they need it.

From the bustling docks of the past to modern self-storage, the sea container has proven itself time and again. It may be just a box—but it’s a box that changed the world.

Such a simple idea yet quite magical!