14 and unitary therewith is the plunger 14 the actuator 70 is formed with a check valve compartment 72 fig5 a at the lower end of which is an inward annular lip 74 a central ball stop 76 extends downward from the actuator head into the upper portion of the compartment 72 a laterally extending portion of the actuator 70 forms the spout 78 fig5 having a discharge passage 80 both the body 12 and the plunger 14 are molded of a plastic such as high density polyethylene which is resilient in thin sections and rigid in thick section the resilience in thin sections is used to advantage in the lip 74 piston seal 56 and in the flap 100 adjacent the sidewall 28 to be explained the upper end of the plunger 14 and sleeve 34 are formed with interfitting lockdown means this comprises the diametrically opposed outward pins 110 fig6 on the plunger 14 and the bayonet grooves 112 in the upper end of the pump body 12 as shown in fig6 and 7 the lower locking portion of the grooves is preferably a radial opening 112a the valving for the dispenser comprises the inlet check ball 81 which seats on seat 24 at the lower end of the body 12 and the discharge check ball 82 which seats on the inward lip 74 at the.