Twelve things people put in a used tote that they should not

1. Drinking water, in an industrial container

The most common and the most serious. A clean-looking container with unknown history is not potable-safe, and absorbed chemistry does not wash out of HDPE. Documented food-grade stock exists precisely so nobody has to guess.

2. Aromatic solvents

Toluene, xylene and their relatives swell and craze polyethylene. The container may hold for weeks and craze in months. This belongs in stainless.

3. Chlorinated solvents

Faster and more aggressive than aromatics. There is no version of this that ends well in a plastic tote.

4. Anything hot

HDPE softens with temperature and creeps under load. A hot fill into a full container produces a bottle that has taken a permanent set once it cools, and the deformation is usually enough to end the container's stackability.

5. Dense product filled to the line

Not a chemistry problem, an arithmetic one. Fertiliser at 10.7 pounds per gallon in a 2,500-pound-rated container reaches the rating at about 220 gallons. Filling to 275 puts it 23% over, and that is what splits pallet bases.

6. Fuel, without checking local rules

The container may well be compatible. Whether you are permitted to store that quantity of fuel in that container in that location is a separate question with a local answer, and it is the question people skip.

7. Concentrated oxidising acids

Dilute aqueous acids are often fine. Concentrated oxidisers are not, and the failure can be energetic rather than gradual. Check compatibility for your specific concentration and temperature rather than for the acid in general.

8. Livestock drinking water, in unknown stock

Same logic as human drinking water and it gets skipped more often, because a field feels less regulated than a kitchen. Use documented stock.

9. Irrigation water for edible crops, in unknown stock

Irrigation water contacts produce. The container history matters as much as the water does. This is the one people are most surprised by.

10. Anything, in a container stored outdoors in a natural bottle

Sunlight plus translucent HDPE grows algae within weeks and embrittles the wall over years. Black UV-stabilised bottles or an opaque wrap solve both.

11. Water, over a Cleveland winter

Water expands. The bottle takes a set, the cage bows, and in spring you have a container that still holds water and no longer stacks. Drain to below the outlet.

12. Two products in succession, without changing the seals

A tote that carried glycol on EPDM and is refilled with a solvent needs new gaskets before it is refilled, not after it starts weeping. Elastomers are consumables and they are chemistry-specific.

What we say when the answer is no

Usually stainless, occasionally a smaller fill, occasionally a different format. We would rather lose a sale of the wrong container than make it, because the failure comes back to us either way and by then it is somebody's floor.

The compatibility conversation, in three questions

Almost every item on the list above is prevented by asking three things before a container is filled.

1. 01What is the fluid, specifically? Not the category — the product, and ideally the safety data sheet.
2. 02What is its density, and at what temperature will it be filled and stored?
3. 03Where will the container live, and for how long? Indoors, outdoors, through a winter, in sunlight.

Density settles the fill level. Chemistry settles the container material and the elastomer. Location settles the bottle colour and the winterisation. Three questions, and they cover the entire failure list.

A short compatibility reference

This is orientation, not a substitute for checking compatibility for your specific formulation, concentration and temperature. The general answer for a product family and the correct answer for your particular blend are not always the same.

The thirteenth thing

Nothing, for years, with the cap off, outdoors. It is not on the list because it is not something people put in a container — it is what happens when they stop thinking about one.

A container stored outdoors uncapped fills with rain, grows algae, freezes, bows, and arrives at us as a heavy unknown that can only be reclaimed. It began as a perfectly good container and nobody did anything to it at all.

Questions about compatibility

Where do I find compatibility data? The manufacturer's chemical resistance chart for the specific resin is the right source, and your product's safety data sheet is the right input. General polymer charts are a starting point rather than an answer.

What if my product is a blend? Test it, or ask the formulator. A blend can be more aggressive than any of its components, and carriers matter more than actives — a mild active in an aromatic carrier behaves like the carrier.

Is there a quick test? Immerse a gasket and a small offcut of HDPE in the fluid at service temperature for a week and check for weight gain, swelling or softening. It is crude and it catches the serious incompatibilities.

Who is liable if it fails? You are, for the decision about what goes in the container. We are, for the container being what we said it was. That division is why we ask about the fluid and why we put the answer in writing.