You can take onboard any liquid items you buy after security screening at the airport, regardless of how large they are. This applies to any EU airport.
Most duty free purchases will be given to you in a sealed bag, do not open this until you’ve reached your final destination. Make sure you keep the receipt, too, as you’ll be asked to show it at any transfer points.
There are other restrictions to consider on your return journey if you’ll be changing flights at an EU airport, or transiting overseas. Please check the relevant sections below.