Originally Posted by irishguy28

I think that EU airports will allow liquids through if still in the sealed bag with the same-day purchase receipt visible, and they were purchased in the EU/EEA [hence not necessarily duty free - as in your example. Most such examples would be duty-paid]. But if the purchase is from outside the EU, even if sealed, then it may not be allowed through.

EDIT: it seems that the non-EU purchases thing was relaxed last January:



Still - it is advisable to buy your duty-free purchases at the last available moment (at the very last airport of departure; on board the final flight of the day; or, when flying to Australia, on arrival at your destination). That way, you have none of the worry of whether the item will be confiscated, you won't need to go to any passenger liquids screening points (some airports have dedicated stations for this, it's not enough just to rock up at the normal gate/transfer security point), and you won't have to carry the items around from flight to flight all day.

Just saw the following on Schiphol's website - which sounds a bit worrying:




Especially based on that last line, I would advise the OP NOT to buy any duty free liquids in the UK, in Abu Dhabi, or on board any of the flights, but instead wait until arrival in Australia. In Sydney and Melbourne, you will walk right buy the on-arrival duty free shops - you can't miss them - and as stated above, you can buy online and they have them ready for collection. I always just walk in and buy them as I am on the way to immigration, but I always arrive late in the evening when neither the duty free nor immigration is busy. If arriving in the early morning, it might be better to pre-order.