Hi Liliana,
I didn't use the hip support cushion as shown in the waterfall photo.
I held the specimen cup in my right hand and used my right elbow as an anchor to lift my body just enough to lean over and be able to spit into the cup as needed. I couldn't believe the yield the last two tests doing it this way. I actually took photos of the specimen cups! I know that sounds gross but that's what I did!