First, Welcome to Flyertalk!

Transporting liquids can be tricky. While policies vary depending which cities / airports you are going through/to, you can probably count on the following.

1. You won't be allowed to bring alcohol (or any liquids > 100ml) purchased before you go through security at your point of departure. So to even get it on the plane, you would need to buy it duty free post security.

2. If your flight is not direct from origin to destination ie. there is a connection at another airport, the chances are good that you will get any liquids confiscated there before boarding your next flight.

3. If you are flying just a single, direct flight, I would call the airline and ask about their policy (though you would almost certainly have to buy it post security).

4. I don't know if it has the potential to cause trouble or not, but I have flown with spirits in the checked baggage many times. No hassles, no breakages. I haven't done it from Europe to Canada, so I don't know if it's the sort of thing that those particular security people might have an issue with.

Basically, a few people who think that it's ok to blow up planes have created a crazy number of hassles for the rest of us, and this liquids issue is just one example.

Good luck, and may the Scotch be worth it!