how many months breast milk pump and feeder bottle should be changed

A. There is no need to change the breast milk pump because pump you have to maintain proper cleanliness hygiene and you’re only using it to pump so it’s not needed to be replaced but if your child is hundred percent bottlefeeding than every two months or three months you should change the feeding bottle because you must be using one feeding bottle at least 3 to 4 times in the day so you can change every two months if you want