Assertion: conical flask | /r/HasProperty | popular
Facets:
value: because of their low price
type: CAUSE
value: very
type: DEGREE
Source sentences:
text: Erlenmeyer flask [introduced in 1861 by German chemist Emil Erlenmeyer (1825–1909)] - is shaped like a cone, usually completed by the ground joint, the conical flasks are very popular because of their low price (they are easy to manufacture) and portability