This may not be important to everyone, but with a history of early loss, I use FRER to see progression of my tests getting darker. I panicked when I used this FRER with an opaque pink cap (top) because it looked lighter than yesterdays test. I decided to try one of the old clear pink cap tests in the same cup of urine and it is much darker! I’m hoping someone sees this and calms them down if they think their tests are lighter.