We used to only drink bottled water when we were on vacation. As soon as we crossed the Dutch border, my parents urged us, kids, not to drink from the tap, because we would get sick. That is so ingrained that I am still reluctant to drink water from an unknown tap.
Tap water is 30 to 1.300 times better for the environment than bottled water because of the non-polluting production process of the packaging and simpler transport. Although the purification of the water needs energy as well.
It is also 150 to 500 times cheaper than bottled water. For 1 euro, a Dutch person can daily drink 1,5 litres of water for a year.