[alx]

In Germany, you should give a try to Flora Power, another mate-based soft drink :

http://flora-power.de/

It's more difficult to find than Club Mate (it's a local brew from Hamburg). Depending on your taste, it contains much less sugar than Club Mate and feels more 'herbal', I prefer this.

[mmarx]

Also, if you happen to find Kolle Mate[0], try one.

If you're looking for places to buy, Matekarte[1] provides a nice map detailing who sells what and the latest status (in stock, only few left, out of stock). Unfortunately, it appears to only be available in german.

[0] http://kolle-mate.de [1] https://www.matekarte.de/

[pilaf]

Thanks for the tip, I'll look for it next time I'm in Germany.