Product review (5 stars): Perfect factory replaceemnt
We moved into a new home and the existing dishwasher dispenser cap was damaged.  Apparently it had come out in a wash cycle and melted because it had touched the heating element in the bottom of the dishwasher.

I used the Whirlpool site to determine that this cap was the right fit.  Amazon had the best price (by far) and delivered quickly and the part is a perfect replacement.