In our experience, this would not work.
Maybe he's drinking too much. Maybe he's got high pressure in there somewhere.
In any case, I can't believe people are paying for this. I have a portable, versatile, washable Peepee Teepee for the Sprinkling Weewees(tm) better known as my very own custom made hand, and other than the years of conservatory training it was completely free of charge.