Assertion: tube | /r/MadeOf | a type of glass
Facets:
Source sentences:
text: The tubes are made from a type of glass called Borosilicate, the same base material as used in many Pyrex glass products used in kitchens around the world.
text: The tubes are made from a type of glass called Borosilicate, the same base material as used in many Pyrex glass products used in kitchens around the world.