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Containers

Nine necks across twenty containers

On this page14
5 at 63TW and then a long tail.

The distribution

5 containers at 63TW, 4 at 89-400, 3 at 70-450G, 2 at 70TW, 2 at 70-400, and one each at 110-405, 70-450, 63-400 and 48-400.

Nine distinct finishes across twenty containers

Which is the most fragmented neck distribution measured in this library. Most shelves concentrate on two or three.

And four of the nine have a single container

110-405, 70-450, 63-400 and 48-400. Which means a closure bought for one of those fits exactly one jar.

The twist finishes are the interesting group

5 at 63TW and 2 at 70TW. A twist finish takes a lug cap, which is the vacuum-sealing closure on this shelf.

The 450G and 450 finishes are the mason family

3 at 70-450G and 1 at 70-450, which is the continuous thread version of a mason mouth. Those are the jars a two-piece lid would fit.

So the gap is visible in the neck data

Four containers on mason-family finishes, and no article in the catalog made for them.

89-400 is the wide generic

4 containers, which is the neck most of this catalog standardizes on. Plenty of plain lids fit it.

Fragmentation costs more than it looks

Nine finishes means nine closure decisions, nine liner specifications and nine order lines for twenty containers.

Which is the argument for standardizing early

Pick a finish, then pick the jar, rather than the other way round. 63TW and 89-400 are the two with any depth.

And the closure count hides it

183 closures sounds like depth. 131 of them are the same plain lid, and the distribution across nine necks is thin.

19 of 20 containers are full case only

With case packs from 12 to 144 and a median of 72. So a nine-neck shelf is also a nine-case-commitment shelf.

And the 70 family has three variants here

70-400, 70-450 and 70-450G, on 2, 1 and 3 containers. Three finishes that look like one number and are not interchangeable, which is the fragmentation at its most expensive.

The one that is not is worth knowing

A single container can be bought in less than a case, out of twenty.

References

The Davis Pack Supply catalog, measured 19 October 2026. 203 rows: 20 containers and 183 closures, which is the second smallest container count in this library and the most lopsided closure ratio measured anywhere, at better than nine to one. 266 to 1,893 mL with a median of 473; 11 over a pint and 5 over a quart. 19 glass and 1 PET. 18 clear and 2 amber, which is the most monochrome shelf measured. 8 glass mason and paragon jars, 6 glass straight sided jars, 3 glass hex jars, 1 PET wide mouth container, 1 glass wide mouth short jar, 1 french square. Nine distinct neck finishes across 20 containers: 5 at 63TW, 4 at 89-400, 3 at 70-450G, 2 at 70TW, 2 at 70-400, and singles at 110-405, 70-450, 63-400 and 48-400. Liners on the closures: 53 heat induction seal, 28 F217, 22 pressure sensitive, 18 No Liner, 16 Plastis standard, 13 PE foam, 12 unrecorded, 11 Plastis pasteur, 9 foam. Buyability, a snapshot: 14 of 20 available, 6 not; 7 quote only; 19 of 20 full case only, with case packs from 12 to 144 and a median of 72.
The Davis Pack Supply catalog, measured 19 October 2026. Home canning uses a two-piece lid, a flat lid carrying a sealing compound plus a separate screw band. The 183 closures indexed to this group are 131 continuous thread polypropylene lids, 27 metal or aluminum CT caps, 12 dome lids, 11 metal lug or twist caps, 1 sealing disc and 1 metal overshell lid. None of them is a two-piece canning lid or a band, and a catalog-wide check finds none either. The shelf nevertheless holds 8 glass mason and paragon jars.
Written from 21 CFR 114.3 and 114.80 and from the catalog as it stood on 19 October 2026. Part 114 governs commercial processors of acidified foods; home canning for a household is not commercial processing, and low-acid canned foods fall under part 113 which is a different and more demanding part not described here. Nothing on these pages tells anyone how to preserve anything, and cottage food laws, which are state law, are what actually govern a home preserver selling jars. There is no two-piece canning lid anywhere in this catalog.