A museum object called a vacuum bottle may contain several materials with different roles. Reading the catalogue description by component gives the familiar household shape a more specific history.
Follow the material description
The Smithsonian National Museum of American History record describes a three-pint, wide-mouth, silvered-glass vacuum bottle in a steel case bearing a Thermos label. The record supplies a layered construction rather than one material for the entire object.
Make a small list of the vessel, case and label. Keep the stated capacity beside the object’s description instead of estimating it from the photograph’s apparent size.
Ask a question the record can support
You might compare how the description identifies interior and exterior components. Do not turn a historical catalogue entry into a recommendation to use or test an old bottle, and do not infer present performance from its familiar brand name.
The useful result is a precise object note: which components are described, what information identifies the record and which construction details remain unexplained. This approach makes everyday manufactured objects worth studying without needing to claim that every surviving example transformed domestic life on its own.