The difference between 18 and 21

What IS the difference between 18 and 21 years of age?
Well, in Finland - you can gamble on the machines in the super market and Hesburger as long as you're at least 15.  You have to be at least 18 to get in the small casino downtown...and to play Bingo (I think).

In terms of 18 and 21?
At aged 18 you're still in high school (they graduate at 19 typically) - and are not able to purchase alcohol above 20% until you are 21 years old.

Here in Finland, you can buy ciders (coolers in North American language) and beer in the grocery stores.  No problem. Yes they'll probably ID you if you look like a kid - but surprisingly enough - I have not been ID'd when purchasing alcohol here.  Anything stronger than beer or coolers are sold at the Alko, an alcohol store which is not open on Sundays...but grocery stores are.

I was only ID'd to buy a burger at Grilli 21 that one time...