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Fire and light
All Containers›Shop by use case›Fire and light›Containers›Fifty-one without a linerShop all fire and light →
Containers

Fifty-one without a liner

By Dwight Davis, Founder

On this page14
A fifth of the closure shelf, on a shelf about staying dry.

The liner distribution

67 heat induction seal, 44 F217, 32 pressure sensitive, 28 No Liner, 23 unrecorded, 23 Plastis standard, 15 foam, 5 polycone, out of 263 closures.

So 51 of 263 have no liner or no record

Which is nearly a fifth, on a shelf whose archetype is named for keeping humidity out.

And the two values are different statements

28 are recorded as No Liner, which is an assessment. 23 are blank, which is an absence of data and means ask.

Which is a distinction our Recyclable field cannot make

The refill and concentrate property measures that: one value, Yes, on all 803 rows, so a blank and a negative are indistinguishable. The liner field is better built.

Heat induction seal is the long-storage answer

67 closures. A bonded foil intact until broken, which suits a cache opened once in years.

F217 is the checked-kit answer

44 closures. Foamed polyethylene that reseals, for a container opened on a schedule and closed again.

Pressure sensitive is the weakest of the three

32 closures. It adheres on first closing and reads as a tamper indication more than a barrier.

5 polycone closures

Which seal a narrow neck, and this shelf has 6 containers at 48-400 and 5 at 38MM. A small matched set.

9 sealing discs

The only article here that makes a container read as unopened, out of 263 closures.

And 1 tamper evident lid

Which for a preparedness cache is the function that matters most and the count that is smallest.

179 of the 263 are plain lids

Continuous thread polypropylene, which seal and reseal and nothing else. The depth is in one article, as it is on most shelves here.

So the specification is two requests

A liner by name, and a sealing disc or tamper lid if the cache has to show whether it has been opened.

Neither is a default

Which is why 51 of 263 closures would quietly fail the one thing this archetype is named for.

References

The Davis Pack Supply catalog, measured 19 October 2026. 471 rows: 208 containers and 263 closures. 30 to 950 mL with a median of 237. 175 jars and 33 bottles, with no tubs, pails or tins. 123 PET single wall jars, 18 glass straight sided jars, 14 HDPE single wall jars, 7 glass mason and paragon jars, 6 HDPE packer bottles, 5 each of PET packer bottles and glass boston rounds, 4 plastic spice bottles. 80 clear, 36 white, 35 amber, 17 black, 17 blue, 11 green, 7 natural, 3 frosted, 2 dark amber. Necks: 72 at 89-400, 42 at 70-400, 29 at 58-400, 18 at 53-400, 6 at 48-400, 5 each at 38MM, 63-400 and 70-450G. Closures: 179 continuous thread polypropylene lids, 42 metal or aluminum CT caps, 22 dome lids, 9 sealing discs, 5 phenolic, 2 metal overshell lids, 2 dairy lids, 1 tamper evident lid, 1 plug seal lid. Liners: 67 heat induction seal, 44 F217, 32 pressure sensitive, 28 No Liner, 23 PE foam, 23 unrecorded, 23 Plastis standard, 15 foam, 5 polycone. Buyability, a snapshot: 131 of 208 available, 77 not; 77 quote only; 51 full case only, with case packs from 12 to 6,370 and a median of 245.
Written from 16 CFR 1500.3(c)(6) and from the catalog as it stood on 19 October 2026. Those definitions describe a substance and say nothing about a container: a flashpoint is the temperature at which a liquid gives off enough vapor to ignite and a container temperature rating is what the container tolerates, so a container can be inside its rating while its contents are above their flashpoint. Nothing here says whether any product is a hazardous substance, what labeling it requires, or whether any container is suitable for a candle, a fuel or a flame. The test method cited in the definitions is not described.