Every year in early August somebody asks why food-grade totes have gone up and whether we are taking advantage of the season. It is a fair question and the answer is genuinely structural.
The affidavit is the bottleneck
Food grade requires two things: a bottle in resin conforming to FDA 21 CFR 177.1520, and a documented history of food-contact use only. The resin is almost never the constraint — most IBC bottles are moulded from compliant virgin HDPE regardless of intended service.
The documentation is the constraint. Every food-grade unit we sell carries a prior-contents affidavit collected from the original filler. That is a piece of paper somebody at a food or beverage plant has to locate, check and sign.
In February, a quality manager at a juice co-packer will sign a batch of those in an afternoon. In August, during the only part of the year their line runs flat out, they will not, and nobody should expect them to.
The shape of the year
| Period | Affidavit flow | Stock position | Price within grade |
|---|---|---|---|
| January – March | High | Comfortable | Band low |
| April – June | Moderate | Adequate | Band low to mid |
| July | Falling | Tightening | Band mid |
| August | Minimal | Scarce | Band high, lead times extend |
| September | Recovering | Still thin | Band high |
| October – December | High | Rebuilding | Band mid to low |
Food-grade availability through a typical year
The pattern is remarkably stable year to year, because it is driven by agricultural and beverage production calendars rather than by anything in the container market. We can forecast the August position in March with reasonable confidence, which is why we tell planning customers to buy then.
Which food streams produce the empties
Not all food-grade empties are equal, and knowing where they come from explains the seasonality precisely.
| Stream | Peak empty availability | Notes |
|---|---|---|
| Corn syrup and sweeteners | October – February | The largest single source; steady and well documented |
| Fruit juice concentrate | November – January | Follows the pressing season |
| Edible oils | Year-round | Steady but lower volume |
| Brines and pickling liquor | September – November | Follows the preserving season |
| Brewing liquor and wort additives | Variable | Small volumes, often retained by the brewery |
| Potable water staging | Post-event only | Unpredictable; municipal |
Source of food-grade empties and when they appear
Notice that nothing peaks in summer. Food plants are busiest then, which means they are filling containers rather than emptying them, and the staff who would sign affidavits are the staff running the line.
Why we do not simply hold more stock
We tried. Food-grade units held through a long summer develop two problems. Translucent HDPE in a Georgia yard crazes under UV faster than almost anywhere in our network, so outdoor storage degrades the grade. Indoor storage at the volume required is floor space we do not have.
There is also an honesty problem. A food-grade unit held dry for five months is not sterile on arrival and needs sanitising before use. We say so, but holding deep stock to smooth a seasonal curve means shipping older units into a grade where freshness genuinely matters.
We can buffer the price curve or we can ship the best units we have. We cannot do both, and the grade exists because of the second one.
What we do instead
Two things, and we are explicit about both in quotes written between July and September.
- Quote [rebottled](/products/rebottled-ibc-totes) alongside. A new bottle in virgin food resin, fitted into a reclaimed shot-blasted cage, with the resin certificate retained against the serial. It costs more than documented used stock and less than new, and it is available regardless of season.
- Tell you the lead time honestly. If documented stock is four weeks out, that is in the quote. A supplier who promises August delivery on food grade without mentioning the affidavit queue is promising something they do not control.
What a buyer can do about it
If food-grade containers are on your annual plan rather than your emergency list, the season is entirely manageable.
- Buy in late winter. The same grade at the bottom of its band, with better choice of base type and valve specification.
- Tell us your annual volume. We can reserve against affidavit flow across the year rather than competing for August stock.
- Consider rebottled for part of the requirement. Splitting a fleet between documented used and rebottled smooths your exposure and the resin certificate satisfies most audit frameworks.
- Ask your own fillers for affidavits. If you ship food product in totes, the affidavit you sign makes those containers worth roughly double to the next buyer. Several of our customers now do this as policy.
The two conditions and how to verify a claim are set out on food grade vs industrial, and the document itself is dissected in reading prior-contents affidavits.
Written by
Nina Caldwell
Trading desk
Prices grades and landed freight. Measured on used-first sourcing and repeat business, not on margin per unit.