If you use disposable bottle liners for freezing breast milk, they may require additional protection to stop leaking and contamination. (verywellfamily.com)
Now there are right - angled bottles that let less air into the nipple, streamlined bottles your baby can hold, and a variety of disposable bottles. (babycenter.com)
You can use disposable bottle liners throughout the day so that you only need to wash your bottle at the end of the night. (wikihow.com)