I'm cheap and lazy..tap drinking water.

I never did buy bottled water when more people used to drink it (but now may not because of the numerous plastic bottle problem for recycling..) Just didn't see the point when so lucky in North America to generally have decent drinking water.

I think this way because my parents drink boiled, hot water on a humid 85-90 degree F summer day. Habit from China ..where their water where they lived had to be boiled before it was drinkable.