As for Bottle warmers - everyone I've tried really sucks. The salt one works only once and then the salt things that get the bottle hot turn hard as rocks and have to be soaked for 15 - 30 minutes in boiling water before they are ready to use again. Where do you get this boiling water when you are out and about? Then they have the ones that plug into your lighter. 30 minutes later & half way up Mulhollund Drive, only half the bottle was warm and the milk was not! Don't waste your money! They don't get the milk warm enough fast enough. Running the bottle under really hot water for 3 minutes works a lot better for me. Leonardo Da Vince would not have approved ... or he would have come up with something that actually works.