And let me just add that when we fly (here in Europe) with our almost 2 year old daughter the liquid rules do not apply.
Last April we had a 2 liter bottle of water and a 50cl bottle of Coca Cola with us and passed 3 checks without problems, and a feeding bottle with white milk powder, just the line "it's for the baby" was enough to pass. Only on the last leg of our flight I had to take a drink from the water bottle.
This is just so true:
The three-ounce container rule is silly enough — after all, what's to stop somebody from carrying several small bottles each full of the same substance — but consider for a moment the hypocrisy of T.S.A.'s confiscation policy. At every concourse checkpoint you'll see a bin or barrel brimming with contraband containers taken from passengers for having exceeded the volume limit. Now, the assumption has to be that the materials in those containers are potentially hazardous. If not, why were they seized in the first place? But if so, why are they dumped unceremoniously into the trash? They are not quarantined or handed over to the bomb squad; they are simply thrown away. The agency seems to be saying that it knows these things are harmless. But it's going to steal them anyway, and either you accept it or you don't fly.