be slideably received within the spout hole 35 of the spout assembly the angle of the plug taper is made different than that of the spout hole in order to prevent the two mating parts from becoming so tightly bound in assembly that it might become impossible to separate the two without the aid of special tools in practice both the spout assembly and the closure unit are molded from the same relatively hard plastic material using conventional molding techniques by using a relatively hard plastic and unmatched tapers the plug can be hand turned into the spout hole with sufficient locking force to prevent the plug from pulling out of the hole under normal operating conditions while at the same time permitting easy hand removal of the plug in practice the plug should when locked in place penetrate the spout hole a distance that is about equal to one half the total axial length of the spout to insure that sufficient contact surface is generated between the two locking members to provide for a secure leak tight joint a bracket 70 is disposed upwardly from the top of the tap housing the bracket is used to store the plug unit 60 once it has been removed from the spout hole the.