I wouldn't worry about it if it doesn't say on the box or instructions to use a certain bag

@santistevanmommie, it doesn't say anything about using a specific bag I just don't want to buy bags then not be able to use them if you know what I mean

Yeah honestly I don't think it matters unless you have a breast pump that requires you to pump straight into the storage bag. I used targets up and up brand one time.

@santistevanmommie, cause i have a medela pump and the bags are so expensive

You don't have to. I have a first years brand pump and use lanolish brand milk bags

I'd go with the ones that are made for your pump.