Product review (5 stars): Exactly what we needed.
This rinsing agent reservoir cap is a part needing replacement all too often due to it falling down into the tub and melting on the heating element in Whirlpool/Kenmore Elite dishwashers.
They should have designed it as a flip open lid such as those used in Miele.
Not easy to determine which is the correct part to order among choices listed at Amazon.
Was able to select the correct one after spending time reading buyer reviews.