I have wondered about one of these water pouches, but I tend not to get too thirsty on my runs. It may be needed more in the warmer months when you are sweating a lot more. I guess I ought to read up more on running nutrition and when you are likely to need something when out there. We may each have different requirements.
You are really smashing it with these long runs. I had heard of the comedian Boothby Graffoe. I guess he is named after that place.
!BEER
RE: Long Run - 23 km (refuelling test run)