Assertion: bottle's bubble | /r/CapableOf | act as insulator
Facets:
value: against the heat
type: TRANSITIVE-OBJECT
Source sentences:
text: Copper is the traditional material for the boiling vessel, because copper transfers heat quickly and evenly, and because the bubbles produced during boiling, and which would act as an insulator against the heat, do not cling to the surface of copper, so the wort is heated in a consistent manner.