I made a list from different reviews of unique souvenirs to the areas we visited- here is what I have for Finland- enjoy your trip!
Finland--lingonberry jam, Anything that's reindeer-related (from reindeer skins to etched crystal to magnets), anything from Marimekko, wooden butter knives.
Helsinki’s famous Kauppatori Market Square, a colorful way to begin exploration of Helsinki. Once there, we purchased a one-day City Card, which gave us free access to sights, museums and public transport, including the Tourist Tram 3T, which makes a 60-minute round trip from Market Square and passes most of the city’s “must-see” sights, including the Senate Square and its beautiful cathedral.