when should the baby milk bottle changed? or what is the duration of plastic milk bottles?

A. Hello mam if you are continuously feeding your child with a bottle only then you can change the nipple every two months and bottle also every 2 to 3 months depending upon how much are you using it. Mostly if it is used on an every day basis to feed the child through the day with bottle only then you can change your bottle every 3 to 4 months. Apart from plastic bottles if you are interested you can go for glass bottles as well as steel bottles as well