Rules for liquids and gels in the EU are essentially the same as in the USA:
- individual items in containers of 100ml or less
- all items should fit in a closed, resealable bag
- of 1 liter capacity
- the bag will be x-rayed separately from your carry on
Some items (prescription drugs) are exempt.
You can ask the duty free store at an EU airport to seal the items you bought and that should[**] get them past the security check at another EU airport.
[*] I picked up my bag in AMS (they're free there)
[**] never tried it myself.