Don’t try this any place else in the world,
but in Switzerland you can drink the water flowing from those fancy, artsy, grand and beautiful fountains that are usually found in many squares or areas where people congregate.
Unless there’s a sign that says not for drinking, the water is safe to drink.
Its source is usually the Swiss Alps – the source of much of the expensive bottled water around the world – or some other pristine body of water, which Switzerland has plenty of.
And certainly it’s probably of better quality than that bottled water you just bought from a store. (Unless, of course, you bought it in Switzerland, in which case you are likely drinking the same water flowing from one of those fountains, except you just paid good money for it).
So there’s no sense in buying water when you come to Switzerland. Just carry your empty water bottle and fill up at will. It’s free and it’s very good.