A cap comprising: an elongated body defining a first channel extending from a first opening in a base portion of the elongated body through a neck portion of the elongated body to a second opening in a tip portion of the elongated body; a side body defining a second channel extending from the first channel near the neck portion of the elongated body to a third opening at a distal end of the side body, wherein a terminus of the tip portion is sloped inward in a manner adapted to be received in a human body opening, wherein an axial dimension of the tip portion extends at an angle relative to an axial dimension of the neck portion; wherein the base portion is adapted to couple to a hand-held container; characterised in that the cap defines: a longitudinal axis through a center of the first opening in the base portion, and a first plane through the first channel and the second channel, wherein the tip portion is angled with respect to the neck portion so that a first portion of an exterior surface of the elongated body in the first plane forms a first acute angle with the longitudinal axis, and a second portion of the exterior surface of the elongated body, diametrically opposed to the first portion of the exterior surface of the elongated body, forms a second acute angle with an exterior surface of the side body in the first plane. an elongated body defining a first channel extending from a first opening in a base portion of the elongated body through a neck portion of the elongated body to a second opening in a tip portion of the elongated body; a side body defining a second channel extending from the first channel near the neck portion of the elongated body to a third opening at a distal end of the side body, wherein a terminus of the tip portion is sloped inward in a manner adapted to be received in a human body opening, wherein an axial dimension of the tip portion extends at an angle relative to an axial dimension of the neck portion; wherein the base portion is adapted to couple to a hand-held container; characterised in that the cap defines: a longitudinal axis through a center of the first opening in the base portion, and a first plane through the first channel and the second channel, wherein the tip portion is angled with respect to the neck portion so that a first portion of an exterior surface of the elongated body in the first plane forms a first acute angle with the longitudinal axis, and a second portion of the exterior surface of the elongated body, diametrically opposed to the first portion of the exterior surface of the elongated body, forms a second acute angle with an exterior surface of the side body in the first plane. a longitudinal axis through a center of the first opening in the base portion, and a first plane through the first channel and the second channel, wherein the tip portion is angled with respect to the neck portion so that a first portion of an exterior surface of the elongated body in the first plane forms a first acute angle with the longitudinal axis, and a second portion of the exterior surface of the elongated body, diametrically opposed to the first portion of the exterior surface of the elongated body, forms a second acute angle with an exterior surface of the side body in the first plane.