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Coffee and tea
All Containers›Shop by use case›Coffee and tea›Six leaves, one physicsShop all coffee and tea →
The products

Six leaves, one physics

By Dwight Davis, Founder

Updated

On this page14
Keep oil in, light out and moisture out. For five of the six.

Spice home and herb dried home

The two the definition is about. Both lose volatile oil through the closure and pigment to light.

Loose tea home

The same physics with a bulkier product. Tea is light and voluminous, so the capacity needed for a given weight is larger.

Which the shelf covers

30 to 18,927 mL with a median of 177, and 45 containers over 8 oz. A tea caddy and a bulk tin are both available by volume.

Ground coffee home and coffee bean home

Which add the off-gassing problem, and there is no degassing valve anywhere in this catalog.

Salt cellar

The exception. No volatile oil, no off-gassing, no light sensitivity. Moisture only.

So five of six want the same closure

A liner that holds a volatile fraction and resists moisture, which is 80 heat induction seals and 44 F217 out of 304.

And one wants the opposite

A salt cellar is used open, with a lid for when it is not. 22 dome lids and 158 jars serve that.

Which makes this an unusually uniform group

Most properties here find different physics per leaf. This one finds one physics, one exception, and a missing article for two leaves.

The material choice is wide

97 PET, 53 PP, 31 HDPE and 24 glass, which is a genuine four-way choice rather than a formality.

Glass is the best barrier and the smallest group

24 of 205. For a volatile product that is the inert wall, and it is the option with the fewest choices.

PET is the commonest and the clearest

97 of 205, and clear is 62 of the colors. Which shows the product and protects it least.

And 28 containers have no neck finish at all

Which are the 24 tubs and pails. Those close with a lid across the full diameter and are matched on diameter rather than on a thread code.

Pick the closure first on this shelf

Because the liner decides the outcome for five of the six leaves and the wall decides it second.

References

The Davis Pack Supply catalog, measured 19 October 2026. 509 rows: 205 containers and 304 closures, which is one of the largest shelves in this library. 30 to 18,927 mL with a median of 177, a 630-fold range: 156 over 4 oz, 45 over 8 oz, 36 over a quart and 20 over a gallon. 97 PET, 53 PP, 31 HDPE and 24 glass. 158 jars, 24 tubs and pails, 22 bottles, 1 tube. 77 PET single wall jars, 20 PP single wall jars, 16 double wall round base jars, 15 glass straight sided jars, 10 double wall straight base jars, 9 plastic round pails. 62 clear, 55 white, 23 natural, 21 amber, 20 black, 11 blue, 7 green, 4 frosted, 2 dark amber. Necks: 54 at 70-400, 36 at 58-400, 28 at 89-400, 28 unrecorded, 11 at 53-400, 9 at 48-400, 8 at 110-400. Closures: 194 continuous thread polypropylene lids, 41 metal or aluminum CT caps, 22 dome lids, 12 round tub lids, 9 sealing discs, 7 plastic round pail lids, 7 spice caps, 3 phenolic, 1 spice sifter disc. Liners: 80 heat induction seal, 44 F217, 43 unrecorded, 37 No Liner, 34 pressure sensitive, 23 Plastis standard, 19 PE foam, 18 foam, 3 polycone. Buyability, a snapshot: 129 of 205 available, 75 not, 1 unrecorded; 76 quote only; 32 full case only, with case packs from 8 to 6,370 and a median of 280.
The Davis Pack Supply catalog, checked catalog-wide on 19 October 2026. There is no product with valve in its family name or product name and nothing describing degassing anywhere in the catalog. Freshly roasted coffee releases carbon dioxide for days after roasting, and a one-way degassing valve is the article that lets it out without letting air in. Among the 304 closures indexed to this group, the only metering articles are 7 spice caps and 1 spice sifter disc.
21 CFR 101.22(a)(2): "The term spice means any aromatic vegetable substance in the whole, broken, or ground form, except for those substances which have been traditionally regarded as foods, such as onions, garlic and celery; whose significant function in food is seasoning rather than nutritional; that is true to name; and from which no portion of any volatile oil or other flavoring principle has been removed." The same paragraph provides that "paprika, turmeric, and saffron or other spices which are also colors, shall be declared as 'spice and coloring' unless declared by their common or usual name", and cross-refers to the spice lists in 21 CFR 182.10 and part 184, which are not enumerated here. The definition addresses a spice from which volatile oil has been removed and is not a shelf-life rule. law.cornell.edu
Written from 21 CFR 101.22(a)(2) and from the catalog as it stood on 19 October 2026. That definition is aimed at a spice from which volatile oil has been removed deliberately and is not a shelf-life rule; nothing here says how long any spice keeps or whether any product has lost volatile oil. The spice lists in 21 CFR 182.10 and part 184 are cross-referred in the section and are not enumerated here. There is no one-way degassing valve anywhere in this catalog.