When you’re re drinking two litres of water a day in Europe on long hikes, or 4-5 litres a day on Kilimanjaro it’s easy to get sick of the taste of water.
I use SiS hydration tablets for long hikes. They don’t offer any energy (i.e. they are calorie-free), but they taste nice (which encourages you to drink more) and replenish good thingies in your system. During the summer I was getting some cramps on cycling commute and after using these (one every other day) I stopped getting cramps.
As with all these things, try them before you go hiking.
Another suggestion is to get the new Robinson’s Squash’d drinks – mega-uber-super-powerful squash/ cordial. Ishai and I have used these on our recent hikes. It’s flavour packed without the good-thingies replenishment.
Finally, I’ve used chlorine tablets and a separate neutraliser from GoOutdoors for the last few hikes and together the taste is fine. In fact, I did a taste sampler at a recent Scout meeting and half the Scouts couldn’t tell the difference between purified and neutralised water compared to untreated tap water.