A flexible wiring substrate is provided which realizes a fine pitch of a wiring pattern and improves mechanical strength of the wiring pattern so as to prevent breaks or exfoliation of the wiring pattern. The first side frame portion includes a longitudinal first recess having a bottom and a top, and the second side frame portion includes a longitudinal second recess having a bottom and a top. % of one or more carboxyl-functional components A) and 80 wt. When the aperture is in its closed position, the stopper prevents the liquid hair dye already in the conduit from flowing back to the plastic bag inside the bottle.