Water

I always drink water when I am at a restaurant. In fact, I always drink water. Even if I'm drinking something else with my meal, say, a beer, I will usually drink water in addition. In US restaurants, it is customary to brink complimentary water to the table, and refill it continuously. In Germany - probably in Europe - people don't drink water in the same way.  In fact, there are no drinking fountains - zip, zilch, nada. Even at the university, Hochschule München, there are no drinking fountains. So I have learned to bring my 1-liter Nalgene bottle with me every day (filled, of course) so that I have something to drink.

In restaurants, also, they do not bring water. In fact, if you ask for water, what you are really doing is ordering a bottle of "mineral wasser." And you'll have to pay for it. And it's expensive. I knew this, but on a recent trip to a restaurant, I forgot. The first thing the waiter does is ask for your drink order (similar to the US), and when we ordered "DunklesWeissbier" (dark wheat beer) he must have asked if we wanted water. I reverted to my old, US, ways, and said yes. Of course, he brought a 750 ml bottle of Acqua Panna, which turned out to cost 5,80 EUR, more than one of the 500 ml beers, which only cost 3,60 EUR.

My advice: bring your own water when you go to a restaurant.

Bill including pizza, bier, and wasser.

Postscript. You'll notice that there is tax - it's called VAT, value-added tax - and it's 19%, which is a lot, but the tax is included in the price of the items. It's not added on at the end. This makes it very easy to calculate your bill.