an inner chamber 18 and an outer chamber 20 said inner chamber 18 having outwardly sloping walls capable of holding a laundry additive said outer chamber 20 having a larger diameter than and coaxially positioned to said inner chamber 18 at the bottom of said outer chamber 20 are one or more apertures 22 which allow an additive to drain into a mixing area often a washing machine tub said inner chamber 18 has a parabolic shape and is defined by the following parameters as shown in fig2 wherein u03c9 is equal to the design angular speed radians seconds set less than or equal to the spin speed of the washer and greater than or equal to the peak agitation speed of the washer v c is the inner chamber 39 s volumetric capacity g is the gravitational force r is the radius of the parabolic cup at a given height z c is the height of the fill level and w is the peak angular speed radians second of agitation during operation said dispenser cup 10 functions as follows during a spin phase of a washing unit centrifugal force causes an additive which has been placed within the inner chamber 18 of the dispenser cup 10 to completely flow out of the parabolic shaped inner chamber 18 and into the outer chamber 20 once in the outer chamber 20 the additive continues to flow under the influence of centrifugal force about the inner surface of the outer chamber 20 when the spin phase ends the additive.