Liquid Allowance (Legal)

Hi
I, like many others, absolutely refuse to pay the extorsionate prices at Dalaman Airport
However i do sit there full of envy as i see people who have broken the bank and are enjoying a whistle wetter. I did see a couple take cartons of juice out of their, what i presume was scanned holdall baggage and enjoy the contents.
So my question is .... what is the LEGAL liquid allowance to take to the airport? (if there is one) i figure i could purchase in the UK and take it ready for the return or purchase in Icmeler
John
I, like many others, absolutely refuse to pay the extorsionate prices at Dalaman Airport

So my question is .... what is the LEGAL liquid allowance to take to the airport? (if there is one) i figure i could purchase in the UK and take it ready for the return or purchase in Icmeler
John