Drinking straw with integral filters

摘要

A drinking straw for progressively adding an active ingredient to a carrier liquid as the liquid is drawn through the straw. The straw includes a generally elongate tubular body having an internal bore and a sidewall. The tube includes first and second filters and disposed at respective first and second ends and, of the tube. Together, the first and second filters retain a predetermined measure of soluble active ingredients within the bore of the tube, while allowing a carrier liquid to be drawn through the straw, by oral suction. The active ingredient, takes the form of a plurality of solid pellets. Each filter is formed by blocking, closing or constricting the tube at or adjacent the corresponding end and providing at least one aperture sized to be sufficiently small to retain the pellets within the tube whilst sufficiently large to allow passage of liquid.

主权项

1. A method of manufacturing a drinking straw adapted progressively to add an active ingredient to a carrier liquid drawn through the straw, said method including the steps of:
providing a generally elongate tube having a sidewall defining an internal bore and first and second open ends; providing a first filtration means adjacent the first end of the tube; depositing a plurality of pellets containing a measure of soluble active ingredient into the tube through the second end; and providing second filtration means adjacent the second end of the tube, wherein said first and second filtration means retain the pellets substantially within the tube whilst allowing the carrier liquid to be drawn through the tube by oral suction and wherein at least one of said filtration means is provided by forming the sidewall adjacent the respective end of the tube into filtration means by pinching and welding together the tube to form more than two sides and to at least partially block the tube.