Seems like an odd solution. The problem, according to another non-paywalled article [1] is that astronauts complained about lack of liquids on long spacewalks and [glorified] diapers being annoying to wear. So this contraption which has a volume of 38cm by 23cm by 23cm was developed. I say it's weird because that's 20 liters of volume (to say nothing of the additional complexities/breakable stuff involved)! Why not simply use 10 or 20% of the volume and add more room for refreshments? And perhaps keep the idea of providing a tube, and just direct it to a diaper.

Far less complex, far less volume, far less mass, far less likely to break, far cheaper, and probably far more pleasant for the astronaut as well.

[1] - https://www.theguardian.com/science/article/2024/jul/12/scie...