Containers

Ten fields and what they distinguish

On this page11

Ten specification labels appear across this shelf Four of the ten are on every row And the temperature range field takes exactly three values on this shelf So on this shelf it tells a buyer nothing the material field did not Across the whole catalog that is not true Three fields carry real discrimination Two fields are nearly absent And a nearly absent field fails differently from an uninformative one Which is the point of counting values rather than rows The tenth field is the interesting one and it gets its own page References

Four fields are complete. Two of those four say nothing beyond the material.

Ten specification labels appear across this shelf

Capacity, color, material, temperature range, case pack, height, neck finish, recyclable, width and liner. Which looks like a well described shelf until the distinct values are counted.

Four of the ten are on every row

Capacity with 29 distinct values, color with 9, material with 3 and temperature range with 3. All 238 containers carry all four.

And the temperature range field takes exactly three values on this shelf

117 PET rows read minus 40 to 120 F. 71 polypropylene rows read 0 to 240 F. 50 glass rows read minus 100 to 300 F. A one to one mapping onto the material.

So on this shelf it tells a buyer nothing the material field did not

Filtering on temperature range is filtering on material under another name. Which is worth knowing before building a search around it.

Across the whole catalog that is not true

The field takes nine distinct values across 2,150 products. So it is a genuine specification in general and a restatement here, and which of those it is depends on which shelf you are standing on.

Three fields carry real discrimination

Case pack with 82 distinct values on 237 rows. Height with 146 values on 224 rows. Neck finish with 21 values on 222 rows. Those three are doing the work.

Two fields are nearly absent

Width appears on 14 rows of 238 and takes 11 values. Liner appears on one row and takes one value. Neither can be used to narrow a shelf because almost nothing carries them.

And a nearly absent field fails differently from an uninformative one

A filter on width silently drops 224 rows. A filter on temperature range keeps everything and tells you nothing. The first looks like a narrow shelf and the second looks like a successful search.

Which is the point of counting values rather than rows

Coverage says how many rows have an answer. Distinct values say whether the answer separates anything. A field needs both to be useful and these ten divide into three groups on exactly that test.

The tenth field is the interesting one and it gets its own page

Recyclable, on 117 of 238 rows, with exactly one value.

References

The Davis Pack Supply catalog, measured 19 October 2026. Ten specification labels appear across this group’s 238 containers, with the number of rows carrying each and the number of distinct values it takes: Capacity, 238 rows and 29 values; Color, 238 and 9; Material, 238 and 3; Temperature range, 238 and 3; Case pack, 237 and 82; Height, 224 and 146; Neck finish, 222 and 21; Recyclable, 117 rows and one single value; Width, 14 rows and 11 values; Liner, one row and one value. On this shelf the three temperature range values map one to one onto the three materials: 117 PET rows read minus 40 to 120 F, 71 polypropylene rows read 0 to 240 F and 50 glass rows read minus 100 to 300 F. Across the whole catalog of 2,150 products the field takes nine distinct values, so it is not a material restatement everywhere, only here.

Written from 40 CFR 279.22 and from the catalog as it stood on 19 October 2026. That section governs how a used oil generator stores used oil; it does not govern fuses, clips, clamps, bulbs, retainers, caps or valve stems, and it does not reach any container on this shelf. Nothing here says any container may be used to store used oil or any other fluid, and nothing here is guidance about handling or disposing of used oil. No container on this shelf is described as being in any particular condition, because the catalog records a specification and not a state. This shelf is a subset of the store-small-dry shelf and the sewing notions property enumerates that shelf.