Hola!, I am a fan of Ubuntu Mate and I always drink mate while working.
I thought we need a desk with real mate!
It is not a great wall, but it will be an idea for those who do it better.
Greetings from Patagonia and I'm sorry for my poor English.
So, drink mate!
...and Themes alike - Barbacua for red, Despalada for blue, Organic for green and Compuesta for everything else. Ubuntu is animal-themed though, as far as South Africa is concerned, but sip of yerba is indeed much wanted!
Greetings from Bessarabia and sorry for my poor Spanish 
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maté: