I've joined forces with the hobbyDB team to create a database of every Starbucks Mug ever made! You can use hobbyDB to manage your collection and wish list, show it off, find values for your mugs, and to trade, buy and sell. We currently have four volunteers and would love to have more join the team. If you'd like to help, contact the guys at hobbyDB.
Starbucks City Mugs 
Where do you buy these? Was in Helsinki in October and the store did not have their cups in yet.
Not sure but the local stores should have them. They may just be out.
Where I can find one of those
Please try to find it on Amazon or Ebay.