Years back all we had were dented Sigg bottles in our rucksacks, but of course times move on. We now have a whole array of different ways of carrying water in the hills. The thing that mixed it up and moved us on was plastics giving us bladders with drinking tubes and new bottle designs but metal hasn’t been left behind, stainless steel bottles have become the standard and the durability and easy-cleaning nature of one of those could see you use the same bottle for life. I take my hydration very seriously on both day walks and on backpacking…