US Patent 11059636 Discharge container

A discharge container includes: a double-walled container body including an inner layer body and an outer layer body; a discharge cap having a discharge outlet, the discharge cap being attached to a mouth of the double-walled container body; and a check valve structure. The check valve structure has a tubular partition wall defining a flow path of the content and a valve body which is provided on the partition wall with a hinge portion and has a single swing structure, and space inside the partition wall rather on the discharge outlet side than on the valve body side serves as a liquid reservoir space where part of remaining content is stored after the discharge of the content.