Hi hippychick, and welcome to the forum!
Coffee is around 6 zloty (PLN) and a coke a similar price (in a restaurant or cafe of course) -you can buy a can of coke in a shop for about 2 PLN. Stick to Polish currency, as the euro is not accepted in shops. However, do NOT change your cash for Polish zloty until you arrive in Krakow - you will get a much better rate in the city than in your home country or at an airport. Have fun!
- Posted by Jabber
from Poland on Jan 16th, 2011