Containers

Twelve orphan necks

On this page12

The measurement 18DIN is the dropper neck One more container is orphaned too And the imbalance runs the other way as well So the closure count is misleading The good pairing is 20-400 18-400 is the second workable dropper neck Why this happens Which makes the neck the first thing to check And it is checkable in both directions Our data supports the check References

A sixth of the shelf cannot be closed from the shelf.

The measurement

12 of the 74 containers in this group carry an 18DIN neck. There are no 18DIN closures in this group at all.

18DIN is the dropper neck

A European finish built for dropper and pipette assemblies, which is exactly what this category uses. So the orphans are the most on-category bottles here.

One more container is orphaned too

A single container at 43-485, with no matching closure. Which brings it to 13 of 74.

And the imbalance runs the other way as well

38 closures fit the 3 containers at 38-400. 30 fit the single container at 33-400. 21 fit the 2 at 24-410.

So the closure count is misleading

215 closures against 74 containers sounds generous, and the distribution means a sixth of the containers have nothing and some necks have thirty options for one bottle.

The good pairing is 20-400

31 containers, 42 closures, 23 of which are droppers and 8 child-resistant. If the neck is not dictated by something else, that is the one to build on.

18-400 is the second workable dropper neck

4 containers and 12 closures, 9 of them droppers. Small but matched, which is more useful than large and unmatched.

Why this happens

Containers and closures are indexed against the same archetype and matched by neck afterwards. An archetype that is right about format can still assemble a shelf that does not close.

Which makes the neck the first thing to check

Before capacity, before color and before case size. A beautiful amber 18DIN bottle on this shelf has no lid.

And it is checkable in both directions

A bottle with no closure is the obvious failure. A closure family with thirty options for one bottle is the quieter one, because it makes the shelf look deeper than it is.

Our data supports the check

Neck finish is published on container and closure alike, so the match is verifiable before ordering. That is the part that works.

References

The Davis Pack Supply catalog, measured 19 October 2026. Twelve of the 74 containers in this group carry an 18DIN neck and there are no 18DIN closures on this shelf, so a sixth of it cannot be closed from it. One further container at 43-485 also has no matching closure. In the other direction, 38 closures fit the 3 containers at 38-400, 30 fit the single container at 33-400, and 21 fit the 2 at 24-410.

The Davis Pack Supply catalog, measured 19 October 2026. 289 rows: 74 containers and 215 closures, the same rows the vape group returns. 10 to 120 mL with a median of 30; 60 over half an ounce, 30 over an ounce, 16 over 4 oz. All 74 are glass and there is no plastic at all. 69 bottles and 5 jars, with 60 of the bottles glass boston rounds. 20 clear, 18 amber, 17 blue, 7 frosted, 5 white, 2 purple, 2 green, 2 red, 1 black. Necks: 31 at 20-400, 12 at 18DIN, 9 at 24-400, 4 each at 18-400, 22-400 and 43-400. Closures: 102 continuous thread polypropylene lids, 41 dropper assemblies, 20 metal or aluminum CT caps, 19 CT CRC, 14 phenolic. Buyability, a snapshot: 54 of 74 available, 19 not, 1 unrecorded; 20 quote only; 71 full case only.

Written from 27 CFR 17.131 and 17.132 and from the catalog as it stood on 19 October 2026. Part 17 is a drawback provision, a mechanism for recovering federal excise tax on distilled spirits used in nonbeverage products. It is a tax rule rather than a safety or packaging rule, and nothing here states whether any particular product is within its scope. Availability, quote-only and full-case figures are a single snapshot rather than a trend. The twelve 18DIN containers on this shelf have no matching closure on it.