how do you ladies warm up your little ones formula? I really hate warming up plastic π
If the bottles you use are microwave safe and BPA free, warning them up in the microwave is completely fine and safe :) mostly all bottles you can buy are BPA free anyways so it isn't a big deal. Bottle warmers are pretty cool though and you can get one for fairly cheap!
I don't warm it up, my daughter drinks it at room temperature
You can buy glass. I have glass bottles and love them. Dr brown makes them I think you have to get them online. Even BPA free plastic they think is bad too. The substitute they have been using to make it BPA free isn't as good as they thought it was