passing through a one way valve 14 assembly details of which are shown in greater detail in fig2 and to which view attention is momentarily directed the valve 14 includes a disk 16 having either one or a plurality of holes 18 therein to allow for passage of the ambient air the disc 16 can be formed of any desired material although plastic is preferred a post 20 having an enlarged end forms a protrusion that can secure a rubber disk 22 thereto the rubber disk 22 having a hole 22a in the center thereof that is capable of expanding a sufficient amount to allow the hole 22a to pass over the post 20 beyond the protrusion thus securing it in position other means to better secure the rubber disk 22 about the post 20 to the disk 16 include the possible use of a spring 24 the spring is contained within the cylinder 12 so as to apply a force to the rubber disk 22 thus maintaining it in a position of cooperation adjacent to the disk 16 during use the rubber disk 22 is disposed adjacent to the disk 16 the rubber disk 22 is flexible and when the user inhales he creates a partial vacuum within the cylinder 12 ambient air which is now under greater pressure than the partial vacuum within the cylinder 12 enters into the intake end 12a of the cylinder 12 and forces the rubber disk 22 of the valve 14 assembly to retreat from the disk 16 thus allowing the passage of ambient air through the holes 18 and further into the.