Alsterwasser is a typical Hamburger drink. I think they sell it bottled, but you can also make it yourself. You can do it with half a glass of beer
(preferably Holstein made in Hamburg), and half a glass of a clear soft drink
(like Sprite). Pour the soft drink first, take the gas out shaking a spoon
inside the class, and then pour the beer. It's delicious, and accompanied with a Currywurst (a frankfurter with curry sauce) or any other local dish that you
can find almost anywhere in city, you'll have the perfect combination.
Try it out!!!!!!!!!!