Hiya, we're flying to Florida on Saturday (yay!) I'm bf 2mth old dd but me & dh are hoping to get my mum to babysit a couple of nights & want to leave her with a formula back up just in case. I have got some steribottles but was wondering if they sell formula cartons out there or can I take a couple of cartons in luggage (I know I can't take it in hand lugagge). It would be pointless to buy a whole box of powder and I can't express.