Contamination-resistant dispensing and metering device

摘要

A cap for dispensing liquids from a container comprising a base portion; structure to attach the base portion to a container; and an off-center dispenser tip projecting from the base portion and having a passageway extending between an orifice at the distal end of the dispenser tip and the interior underside of the cap, the axis of said passageway forming an angle of no greater than 90 with the longitudinal axis of the base. Included is a composite membrane having liquophilic and liquophobic components for preventing fluid contamination and metering dispersing.