If you’re visiting Finland and want to buy souvenirs, consider getting something made out of cloudberry (lakka, hilla or suomuurain in Finnish). Cloudberries grow only in the northern hemisphere on/near swamps. Cloudberries are “very juicy, and they taste a bit like a cross between a raspberry and a red currant. They are fairly tart when eaten raw with a bit of floral sweetness” (source x).
Cloudberries are not rare or endangered but they are quite pricey because it is nearly impossible to cultivate them. They are still picked from their natural growing places, which are far away from settlements, hard to reach and usually full of mosquitoes and horse-flies. The “cloudberry centers” of Finland are especially Ranua, Utsjoki and some parts in Eastern Finland (Vaara-Suomi).
Finns typically eat cloudberries/cloudberry jam with leipäjuusto (”bread cheese”, the Finnish squeaky cheese). You could also have cloudberries with some sugar and whipped cream or with ice cream. Some cloudberry products you could buy are cloudberry jam, juice, liqueur, marmalade, candies or baked goods.