I believe that the "Travel Tap" is an updated version of the bottle I carried with me on the TGO Challenge last year. A little heavy for its capacity, but couldn't be easier to use and had a very good flow rate. I still avoided obviously bad water sources of course, which was even enough given the plentiful supply in the Scottish countryside. Mind you, mine was a gift so I only had to swallow the water, not the price
Not absolutely essential for the sort of hiking and camping I tend to do, but preferable to chemical treatments and a lot quicker than boiling.