Seems like bubble tea is conquering Europe, including Switzerland. Well, the original thread is more than 3 years old, so I hope all those craving for it did make it through this bubbleless desert...
Sabotai, Militärstrasse36, Zürich;
www.sabotai.ch
Caf -Bar City-West Vo Tuyet, Laupenstrasse19, Bern;
www.bubbletee.ch
It is also sold in restaurants, now.
http://www.swiss-bubbletea.ch/standorte.htm