Kaldi is a top quality coffee and tea franchise in the Netherlands, with shops in Belgium and even China too!
And for specific events, there's the "Kaldi Mobiel", a three-wheeled mobile coffee and tea bar to hire to serve tea and coffee on location! ;o)
Download + build your own papercraft blank/colour-yourself three-wheeled Kaldi Mobiel (by Xpresz):
(download instructions: click the "Download HIER" link under "Voor de kinderen" near the bottom of the page)