The valve was assumed to exist
Updated
On this page13
A degassing valve was looked for
There is none in this catalog. Checked catalog-wide: no product with valve in its family name or product name.
And an induction seal was used instead
80 of the 304 closures here carry one. On fresh roasted coffee that is a sealed rigid container with gas being generated inside it.
Or a loose lid was used
Which vents the gas and admits oxygen, so the problem the valve solves is traded for the problem it prevents.
The household case was assumed to generalize
A jar opened daily vents and is exposed anyway, so for a household the absence matters less. For anything sold sealed it matters a great deal.
Headspace was ignored
Volatile oil leaves into the air above the product, so a half-empty jar loses faster. 20 containers here are over a gallon.
A clear jar was chosen for a pigmented spice
62 of the 205 containers are clear. Light degrades pigment and oil, and the protective options are 21 amber, 2 dark amber, 20 black and 4 frosted.
The sifter was assumed to be available
7 spice caps and 1 spice sifter disc out of 304 closures. Eight metering articles on a shelf of 205 containers.
And the liner was left unspecified
37 closures recorded as No Liner and 43 with nothing recorded, so 80 of 304 either have no liner or no record.
A blank was read as no liner
Those are different statements and we do not guess at the field.
Capacity was chosen for the purchase rather than the use
A gallon of ground spice in a household is mostly air after a month, and the loss rate follows the headspace.
The tubs were matched by neck
28 of 205 containers have no neck finish, because a tub closes with a lid across its diameter. 12 round tub lids and 7 pail lids are what fit.
Buy the closure first, then the jar, then the size
Which on this shelf is the order that matters, because the closure is the loss path and the size sets how much is lost.