3 days ago, BKK-KWI, entered the airport with a 1 litre bottle of water, bought 4 x 500ml bottles of water inside the airport (TG C class really not good at bringing water round during the flight, despite the warnings). Wasn't asked once...
Whereas January at Heathrow I had a 500ml water in my hand luggage... the woman at the screening counter said "is there something you shouldn't have in your bag sir?" and asked me if I wanted to finish drinking the bottle there before progressing further into the terminal.