I made a "life mistake!" NZ should have been my LAST country to visit, darn it!
I cycled the whole perimeter of the North Island in a month. I was SO overwhelmed by the happiness of the community of me on "holiday", I felt there was a national competition going on of "which NZ area can be the NICEST to a visitor."
Your "Great Walks" may not need this new hydration device, since fresh water to filter is easy to find.
As for your response . . . "Good on you!"