Now here is the thing you should be thinking about. Don't worry about your foudation, duty free, lipstick etc. and yes Mr Hools you need to address this problem on your return flight.
Those of you who like to drink Bintang (or any other beer really) at the airport are going to have a lot more than 100ml slopping around in your bladder and most of it will have been obtained before going through customs. Also come to think of it for big beer drinkers let's be honest; that particular container is not clear and may well hold a darn sight more than 1 litre!!!
That's pulled you all up with a shock hasn't it? Now, what are you going to do about it? Somebody should ring customs or the airport or wherever and ask.
Let's tackle the big issue here. Forumites unite!!!