Eight lives
of one cage.
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A container here does not have a lifespan. It has a route, and seven of its eight stops lead back to the start. Intake, grading, washing, pressure testing, resale, rebottling, fabrication, regrind — with regrind reachable only by failing four separate questions. A galvanised cage typically outlasts three or four bottles, which is why we buy frames even when the bottles are dead.
Why the route matters more than the rate
Any reclaim operation can report a high diversion rate. What distinguishes them is where inside the diverted fraction the material lands. Ours is a sequence of deliberately hostile questions about whether the object can be saved, asked in descending order of how much embodied work each answer preserves.
Eight stops, in order
- Intake and de-label. Before a trailer is unloaded, each data plate is photographed and prior contents are logged against the serial number. This happens first because everything downstream depends on provenance, and provenance cannot be recovered later. No plate means no food-grade path, permanently.
- Grade on the pad. Twenty-seven points by hand, about four minutes a unit. Bottle clarity and crazing, cage geometry and welds, valve seat and boss face, pallet integrity, data plate legibility. The grade is assigned after the work, never before.
- Wash, or divert. Residue class decides the cycle: single pass for syrups and brines, long caustic with surfactant for oils, mechanical plus caustic for latex. Cured resins and polyurethanes are not washable and divert straight to rebottling or regrind.
- Pressure test and certify. 3 psi timed air hold on everything that will be sold as Grade A or better. Result and duration printed with the unit.
- Back to service. The best outcome and the most common one. Same object, new job, roughly 71 lb of CO₂e avoided against a new unit and essentially no new embodied energy spent.
- Rebottle. When the bottle is compromised but the frame is not. Cage inspected, jigged, blasted, zinc-recoated; new virgin bladder fitted. 48 lb of steel and a 32 lb pallet stay in service; about 54 lb of CO₂e avoided against new.
- Fabricate. When the bottle cannot hold pressure but can still hold something. Planters, compost brewers, cut-top vessels, cage frames, stands. This is the step that moves our reuse rate from the low eighties into the low nineties.
- Regrind. Only after a second grader answers no to all four salvage questions. 38 lb HDPE to pellet, 48 lb cage and 32 lb pallet to galvanised scrap, timber to mulch and fuel. About 7% of intake, and 11% of that gets pulled back out at the second look.
One cage, traced
A real pattern from our records, condensed.
| Turn | What happened |
|---|---|
| Life 1 · 2014 | New unit, corn syrup, single trip to a bottler |
| Life 2 · 2015 | Washed, resold food grade, maple sap |
| Life 3 · 2017 | Washed, resold food grade, juice concentrate |
| Life 4 · 2019 | Bottle crazed → rebottled, new bladder, potable water |
| Life 5 · 2021 | Washed, resold Grade A, liquid fertiliser |
| Life 6 · 2023 | Washed, resold technical, dust suppression |
| Life 7 · 2024 | Bottle failed → cage sold cage-only, raised beds |
| Life 8 · ongoing | Still in a market garden in Jefferson County |
What kills a cage
- Standing water. Coating breach plus a wet yard equals corrosion through the tube wall. The single biggest cause.
- Forklift strikes. Repeated hits rack the frame until the diagonals are beyond jig recovery.
- Stacking onto damaged frames. One bent lower horizontal under load propagates into a collapsed corner.
All three are handling, not wear. Keep units off wet ground and the frame will outlast the business.
Handling guidanceLifecycle questions
Do cages really last eight lives?
A galvanised cage that is kept out of standing water and not struck by a forklift will outlast three or four bottles, and bottles themselves get two to three service lives each. So eight turns for a cage is normal and we regularly see more — we have resold units with 2005 date codes whose frames are still square and still pass a jig check.
What ends a cage's life?
Corrosion through the tube wall, which almost always starts where coating was breached and the unit then sat in standing water. Second is geometry: repeated forklift strikes rack the frame until the diagonals are beyond jig recovery. Both are handling failures rather than wear, which is why our staging instruction to fleet customers is mostly about keeping units off wet ground.
Why is the loop drawn as a circle rather than a line?
Because a container does not have a lifespan here, it has a route, and most stops on the route lead back to the start. A unit washed and resold comes back in eighteen months and goes round again. The only genuinely terminal stop is regrind, and getting there requires failing four separate questions.
Every stop, with the decision and the cost
| Stop | Decision made | Cost to us | Share of intake | CO₂e outcome |
|---|---|---|---|---|
| 1 · Intake and de-label | Is there a legible plate, and what did it hold? | Labour, ≈2 min | 100% | — |
| 2 · Grade on the pad | 27 points. Which route does this take? | ≈4 min per unit | 100% | — |
| 3 · Wash or divert | Residue class — washable, or not? | $28 – $65 | ≈82% | ≈11 lb spent |
| 4 · Pressure test | 3 psi timed hold — Grade A or below? | Rig time | ≈61% | — |
| 5 · Back to service | Sell as a container | — | ≈73% | ≈71 lb avoided |
| 6 · Rebottle | Bottle gone, frame sound? | $185 – $215 | ≈9% | ≈54 lb avoided |
| 7 · Fabricate | Cannot hold pressure — can it hold anything? | $32 – $520 | ≈11% | ≈76 lb avoided |
| 8 · Regrind | Second grader: no to all four salvage questions | Processing | ≈7% | ≈23 lb avoided |
Shares overlap because a unit can pass through several stops. What matters is the terminal disposition: 93% leaves as an object, 7% leaves as material.
One cage, nine years, six products
From the routing log. Prior contents are tied to serial numbers at intake, which means after a decade we can answer a question nobody set out to ask.
| Pass | In | Prior content | Finding | Route | Sold as |
|---|---|---|---|---|---|
| 1 | Nov 2014 | Corn syrup | Excellent, one trip | Hot water wash | Food grade |
| 2 | Sep 2015 | Maple sap | Excellent | Hot water wash | Food grade |
| 3 | Mar 2017 | Juice concentrate | Dye staining, permanent | Caustic wash | Food grade, disclosed |
| 4 | Jan 2019 | Juice concentrate | Crazing, four lower corners | Rebottled | Rebottled, potable |
| 5 | Apr 2021 | Potable water | Sound | Caustic wash | Grade A industrial |
| 6 | Jun 2023 | Liquid fertiliser | Chalked, second bottle crazed | Cage only | Planter frame |
Nine years, six products, two bottles, one cage. Six sales for us, six purchases avoided for somebody, and roughly 400 lb of CO₂e not emitted across the chain against six new units.
Three failure modes, all of them handling
| Cause | Mechanism | Preventable? | Prevention |
|---|---|---|---|
| Standing water under the base frame | Coating breach plus a wet yard corrodes galvanised tube from the underside, where nobody inspects | Entirely | A pair of reclaimed pallets under a row. Costs nothing |
| Forklift strikes to lower horizontals | Repeated hits rack the frame until diagonals are beyond jig recovery | Largely | Four-way entry bases, trained operators, no pipe-wrench culture |
| Stacking onto a damaged frame | One bent lower horizontal under 2,400 lb buckles at the weld; the upper unit drops and splits | Entirely | Never stack onto a bent rail or a cracked base weld |
| Freeze deformation springing the frame | A brim-filled tote expands 9% and pushes the cage out of square from inside | Entirely | 10% headspace, or drain and invert |
| Age | Not a failure mode | — | We resell 2008-coded cages every week |
Notice that none of these is wear. A galvanised cage kept off wet ground and not struck by a forklift will outlast the business that bought it — which is the entire premise of buying frames even when the bottles are dead.
Detailed questions
Do cages really last eight service lives?
A galvanised cage kept out of standing water and not struck by a forklift will outlast three or four bottles, and bottles get two to three lives each. Eight turns is normal and we see more — we have resold units with 2005 and 2008 date codes whose frames still pass a jig check.
Why is the loop drawn as a circle rather than a line?
Because a container does not have a lifespan here, it has a route, and seven of the eight stops lead back to the start. A unit washed and resold comes back in eighteen months and goes round again. The only genuinely terminal stop is regrind, and reaching it requires failing four separate questions.
How do you know what a specific unit has been through?
Prior contents are tied to serial numbers at intake and the routing decision is logged at each stop. After a decade that produces a traceable history, which is also the basis of the per-serial diversion statements programme customers receive.
Can a unit skip stages?
Routinely. A clean syrup tote with an intact plate goes intake → grade → single-pass wash → test → resale in nine days. A cured-resin unit goes intake → grade → second look → regrind. The route is a decision tree rather than a conveyor.
What happens to a unit at the end of its last life?
Disassembly into clean streams: bottle granulated, flake-washed, dried and pelletised; cage and steel pallet baled separately as clean galvanised scrap; timber ground for mulch and boiler fuel. About 118 lb recovered per unit, with only the valve and gasket — under half a pound — left unplaced.
Is there a point where reuse becomes false economy?
Yes, and we try to name it rather than push past it. A nine-year-old cage with two coatings already on it has less remaining life than a fresh bladder deserves, so we decline to rebottle it and sell it cage-only instead. Forcing a third life onto a frame that will not give it is how reconditioners get a bad reputation.
Put your fleet into the loop
Closed-loop programmes keep the same cages turning and come with a quarterly diversion statement.