For the past few years, manned missions to the ISS take only 6 hours in ascent, all the rendez-vous maneuvering is being done in the duration of 4 orbits.
It used to take a few days, though. However, the crews take a pre-flight enema [0] and go through a diet to avoid having to go #2. There's a story that the Soyuz toilet has been used only once in ISS missions after a Cosmonaut had been eating prunes prior to departure back to earth [sorry, can't find a link].
So for orbital operations to/from the ISS, there's not much use for a space toilet. So little, that I wouldn't be surprised if there's no toilet at all and the fallback plan is to soil your pants, as crude as it sounds.
For the past few years, manned missions to the ISS take only 6 hours in ascent, all the rendez-vous maneuvering is being done in the duration of 4 orbits.
It used to take a few days, though. However, the crews take a pre-flight enema [0] and go through a diet to avoid having to go #2. There's a story that the Soyuz toilet has been used only once in ISS missions after a Cosmonaut had been eating prunes prior to departure back to earth [sorry, can't find a link].
So for orbital operations to/from the ISS, there's not much use for a space toilet. So little, that I wouldn't be surprised if there's no toilet at all and the fallback plan is to soil your pants, as crude as it sounds.
[0] http://gizmodo.com/5245218/the-trouble-with-space-toilets