insulation
also called wall construction
The wall construction of a bottle that determines its thermal retention — single-wall (one layer, no insulation), double-wall (an air-gap between two walls), or vacuum-insulated (an evacuated gap, the 'hot & cold' bottle that keeps drinks hot or cold for hours). This is the thermal axis the supplier pricelists name explicitly for insulated sports/school bottles. single-wall covers the ordinary non-insulated case (a Nalgene Tritan), so the slot is never meaningless. Orthogonal to `material` (a stainless-steel bottle can be single- or double-walled). Concern measurement, axis-eligible. NOTE: insulation is an insulated-vessel-band property wider than WaterBottle (vacuum tumblers and travel mugs share it); when those kinds are opened it must lift to a shared level, not be re-minted.
Insulation is answered with one word chosen from the insulation types list — the same word shared across every product that uses it.
It belongs to measurement — its measurable, physical facts.
asked by the kinds that answer it
1 kind answers it, each for a single value. The same question can be reused by unrelated kinds — one meaning, many homes.
asked by kinds that answer it
The same question can be reused by unrelated kinds — one meaning, many homes.
| kind | how many |
|---|---|
| water bottle | required · one |