Abstract: A lip-pucker avoiding drinking straw providing a tubular body defining an elongated central opening for the flow of liquid without requiring puckering or pursing of the user's lips. The tubular body and elongated opening have a substantially round sectional profile at a distal end meant to be placed into a container of liquid, and a substantially flat-oval sectional profile at a proximal end meant to be placed between the user's lips and to be accommodated by the user's lips without requiring puckering or pursing of the lips. The sectional profile of the elongated opening changes from a round profile at the distal end and through most of the tube body to a flat oval profile at the proximal end segment, with the change of profile occurring at a connecting segment downstream of the proximal end.

Abstract: A lip-pucker avoiding drinking straw providing a tube body defining an enclosed conduit for a flow of liquid. The tube body and enclosed conduit have a substantially round sectional profile at a distal end meant to be placed into a container of liquid, and a substantially oblong sectional profile at a proximal end meant to be placed between lips of a user and to be accommodated by the lips of the user without requiring puckering or pursing of the lips. The sectional profile of the enclosed conduit changes from a round profile at the distal end and through approximately 90 percent of the tube body to an oblong profile at the proximal end, with the change of profile occurring at a transition segment near the proximal end. An optional bending segment can be provided to provide a bend in the tube body or allow the user to make such a bend. The sectional area or circumference of the enclosed conduit at the proximal end is not less than the sectional area at the distal end.