Flying with a toddler - what water to use?

[Tangle]

Sorry for the X-post, but I've just thought of this and we fly on Tuesday, so not long to plan...

As far as we can tell, all the security blurb re. liquids now in place means we won't be able to take any significant volume of tap water with us for DD (26 mths) to drink on the plane. As its a long haul flight we're loathe to rely on the stewards coming round often enough and so would like to take a couple of litres on board with us - but we're going to have to buy it in the duty free.

Does anyone have any advice on any bottled waters we should look out for, either because they're particularly good or particularly bad. Or does anyone know what the guidelines are for mineral content of drinking water for 2 yr olds (I've seen

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I don't think you can take any water through security but you can buy it on the other side.

But the stewards on the flight will help you and for my long haul flight there was a chilled water fountain on the plane.

I think your 2-year-old will be fine whichever water she drinks on the plane