Abstract: A liquid carrying liner which is directly contacted and wetted with a liquid, and a nipple are made disposable. In a liner holder formed of a hard synthetic resin into a cylindrical shape of a predetermined length, there is so inserted and set a liquid carrying liner, which is formed of a thin and soft synthetic resin into a tube shape longer than the liner holder and which is integrated at its upper end portion with a root portion of a nipple, as is positioned and retained without any play. The liner is folded at its folding skirt hanging out by a predetermined length from a lower end portion of the holder, so that the liner is clamped and fixed in a sealed state between the holder and a bottom cap made of a hard synthetic resin and removably fitted on the holder.