STRAW FOR PREVENTING COUNTERFLOW AND MANUFACTURING METHOD THEREOF

摘要

PURPOSE: A back flow prevention straw is provided to prevent drink from flowing back into a container during drinking. CONSTITUTION: A back flow prevention straw includes a pipe shape body equipped with a suction unit and a discharge unit(12). The discharge unit includes: a sealing unit(13) in which one end of the body is attached and is welded; a declined unit(14) which caves in by the negative pressure of the body; and a flap unit(15) which is formed by cutting a part of the declined unit and becomes a closed state by the declined unit that restores to a circular state when a user drinks.