I think it's intended as something of a watersaving system with a built-in filter.
Having said that, I do wonder whether it would be any better than just swishing the razor around in a mug or a bowl.
Complete waste of money & effort designing a product that serves no purpose.
Clearly not a wet shaver.
Also looks very messy so you need to put it in the sink to stop the water going everywhere.
So just put the tap on