formed as balls the second end face 14 is formed with a restriction or throat 28 inside of the threaded portion 21 forming a seat for the upper valve member body 25 the length of the valve member rod 27 is selected so as to hold the body 25 mainly inside the threaded portion 21 when the lower body 26 rests at the opening 23 of the outlet pipe in this position the upper body 25 cannot be gripped by the hand during a squeezing operation the horizontal equator 29 of the ball body 25 is located about midway between the seat 22 and the seat 28 in rest position there is thus a flow passage 30 around the upper valve member body 25 to keep the outlet pipe filled the container is preferably produced by a blowing technique which means that the wall thickness in the neck portion will be about uniform the diameter of the upper valve body 25 is selected so as to permit introduction into the neck portion of the container the space 31 between the valve body 25 and the threaded portion 21 forms a storage chamber facilitating the filling of the pipe when the body 25 engages its seat the outlet pipe 11 terminates in a truncated portion having the opening 23 at its end internally.