Assertion: test tube | /r/MadeOf | plastic
Facets:
value: usually
type: DEGREE
Source sentences:
text: They can be made of ceramic or metal, but they're usually made of glass or plastic.
text: A test tube, also known as a culture tube or sample tube, is a tubular equipment made of glass or plastic.
text: A test tube is a tubular equipment made of glass or plastic.