disposable bottles

[skgnome]

I'm flying with a 5 month old on a trasatlantic flight (18hrs). I do not want to fly with 6 bottles on my carry on and a friend told me about disposable bottles or some bags she saw once that work like bottle liners (i.e. bag goes in bottle so you just need one bottle)
Has anyone used them before? What made are they? where can I get them?
I'm using avent bottles at the moment, baby doesn't likes tomme tippe

there used to be something called steribottles that i used just checked and you can get them on amazon

make sure you try the bottles out before you use them. the teats are different and you need to be careful that you screw the lid on carefully and tightly or it will leak. Once the lid has been screwed on you can't undo it again.