Zero Contamination: designed to ensures that there is no contamination. Simply open the sealing strip when pouring milk, and cut along a cutting line when you need to breastfeeding.
Tempreture Sensing Discoloration: Purple is Cold (＜36℃/96.8℉), blue is Optimum Feeding Temperature (36-40℃/96.8-104℉), and white is Hot (＞40℃/104℉).
Double Strong Sealing: double sealed side seams & double zipper to protect and freeze breastmilk.
Space-saving Design: bags can be freezed super flat or upright.