Assertion: bottle's product | /r/Desires | fluid flow
Facets:
value: under vacuum
type: LOCATION
Source sentences:
text: Innovations such as the introduction of a working check valve in the nipple (to provide unidirectional flow of the liquid food) appeared as early as 1948 in a patent to J.W. Less, and was picked up by others including Owens-Illinois Glass, eventually making its way into Gerber and all modern pressure-balancing bottle designs, as well as adult drinking cups and various other products requiring fluid flow under vacuum.