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US 9,005,684 B2Granted
Drinking straw with integral filters
AssigneeUnistraw Patent Holdings Limited
InventorPeter Baron
Life of this patent
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AssigneeUnistraw Patent Holdings Limited
InventorPeter Baron
Estimating the term…
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.
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:
A drinking straw adapted progressively to add an active ingredient to a carrier liquid drawn through the straw, said straw including:
Dependencies are inferred from the claim text.