The container passport: what we record and why

The habit started because customers kept asking the same four questions after delivery. Writing the answers down before delivery turned out to be considerably less work than answering them afterwards.

What is in a record

Why prior contents sits at the top

Because it determines everything downstream. It decides whether a container can be reused at all, which wash cycle applies, whether it can enter food stock, and what it is worth.

A container with no prior-contents record cannot enter the reuse stream. Not because of a policy we could relax, but because there is no way to select a wash cycle for an unknown, and no way to tell a buyer what they are getting.

Who actually reads these

• Chemical buyers, who want the wash cycle and the elastomer fitted.
• Food and beverage buyers, who need the prior-contents record and the segregation statement.
• Compliance teams, who want the plate and the test date.
• Sustainability teams, who aggregate the outcomes into diversion statements.
• Accounting, on the selling side, who need purchase records with counts and grades for asset disposal.
• Us, when something goes wrong and we need to know whether it was our call or a handling issue afterwards.

The programme version

For container management customers the record becomes a register: every unit in the fleet, where it is, how many turns it has done, how many wash cycles, what has been repaired, when its next periodic test falls due, and whether it has gone missing.

That register is what makes a closed loop reportable. You cannot claim a reuse rate for a fleet you are not tracking, and a quarterly report assembled from memory is not a report.

What it does not do

A record is not a warranty of fitness for a customer's specific application. It states what was in the container, what we did to it and what we found. Deciding whether that makes it suitable for a particular product, process or regulatory context is the customer's call, and we will help make it but we cannot make it for them.

It is also not a substitute for the marking on the container. If a plate becomes illegible, the container is out of regulated service regardless of what our records show.

The unglamorous conclusion

None of this is clever. It is a spreadsheet discipline applied to objects that move around, and its entire value is that most of this industry does not do it. A container with a history is worth more, is easier to sell, is legal in more places, and is much harder to argue about.

Building this yourself, at any scale

None of this requires software. A spreadsheet with one row per container covers the first several hundred units comfortably.

1. 01One row per container, keyed on the serial or a number you paint on the cage.
2. 02Columns for the fields that matter to you — prior contents, plate date, last test, last wash, base type, current location.
3. 03One dated note column for anything unusual.
4. 04A photograph folder named by serial.
5. 05A monthly ten-minute review of anything coming due.

The discipline is more valuable than the tooling. Customers with a spreadsheet and a habit consistently beat customers with a system nobody updates.

Numbering containers that have no serial

Plenty of used containers arrive without a legible manufacturer serial. Paint your own number on the cage in two places — one on a long side, one on the base frame — and record it.

Do not paint over or near the design-type plate. That is how a container loses its regulated status, and it is a common and permanent mistake.

What the record is worth in a dispute

Three situations come up repeatedly, and a record settles all of them in minutes.

The reciprocity point

We keep records because customers ask for them. Customers who keep their own get better answers from us, because a question that arrives with a serial number attached can be answered from a file rather than from a memory.

It is a small habit on both sides that compounds into a supply relationship where nobody is guessing.

Questions about record keeping

How far back do you keep records? Indefinitely. Storage costs nothing and requests arrive years later, usually because a customer's own system changed.

What if we lose our numbering? We can usually re-establish it from serials, plate data and the delivery record. It is easier if you tell us early rather than after a second batch has been mixed in.

Do you record what we put in the container after delivery? No, and we should not — that is your record and your traceability. What we record is everything up to the point it left our yard.

Is there a standard for this? Not one anybody enforces. The fields we use are what customers and auditors have asked for over the years rather than a published schema, which is part of why we publish them.