Vonka is an old hand at capacity challenges and we already know what she is capable of producing, but Syenite is new to this and therefore an unknown quantity. By her own admission, she has a fairly small bladder compared to Vonka, so she is clearly up against it. The truly entertaining aspect of this video is how desperately Syenite tries to hold her pee in the hope of even coming close to the quantity her friend might produce. She escalates from fidgeting to running in circles as she struggles not to lose control, putting off the release until the last possible moment. Only one graduated cylinder exists these days, so one of the girls pees into the vase. After determining the level in the cylinder contributed by one, they pour the other girl's pee in on top and then perform a simple calculation.

31 minutes 11 seconds - 1920x1080 pixels - MP4: 1,464.9 MB