Related to this suggestion: a few years ago, at one of the annual industry and commerce fairs in Okinawa, a company presented a type of urinal that would not require any water for flushing and yet not release any odor. No chemicals had to be used to achieve that, either: their design involved a “plug” of a special oil that would always float on top of the liquid in the appropriately shaped drain.[/quote]
I’LL bear it in mind (sump oil should work, though its a pollutant) if I’m ever REALLY short of flush water, but I can’t see that situation arising, since, unless one stops washing altogether, there is always waste water available.
As well as requiring a much lower flush volume than a WC, some of which is “automatically” generated by hand-washing/teeth cleaning etc, the WHB urinal has the advantage that waste water doesn’t make it scummy (or you can’t see it if it does). This isn’t the case when using waste water in the WC.
Never had an odour problem, though I’d guess you would if you didn’t “flush” promptly.