only time bought bottled water in UK
was tonic water because had quinine to reduce the foot cramp...
we use site tap water & filter it, to reduce limescale in kettle.

We always take the water filter from the fridge at home when travelling We have just returned from 5 nights at CCC Polstead and filled the filter every night from the tap adjacent to the pitch. Enough water for tea in the morning and coffee on return from wherever we had been during the day.