Always have a filled water bottle on hand
It’s important to drink water throughout the day, whether at home or on vacation. If possible, two liters a day. So, always carry a bottle and refill it as often as necessary, taking advantage of the cold water dispensers at any hotel’s reception area or gym, if there is one.
If vacationing in the mountains, it will most likely be possible to fill your water bottle with mineral water directly from the streams that flow down from the peaks. There’s nothing better to hydrate and purify the body than with natural mineral water.