The best water bottle is apparently the one that fits in your bag

Water bottles have become surprisingly complicated objects. A large one can be awkward on public transport, a tiny one needs constant refilling, and a complicated lid becomes another thing to wash. The practical details often matter more than the colour or whatever feature is printed on the box. For people who carry a bottle most days, what actually makes it convenient? Think bag pockets, refill points, cleaning and leaks. There is probably no single perfect choice, but the everyday annoyances are worth comparing.