Momcozy disposable milk storage bags feature a temperature-sensing discoloration function, allowing busy moms to quickly and easily check the temp of their stored milk, purple is Cold (＜36℃/96.8℉), blue is Optimum Feeding Temperature (36-40℃/96.8-104℉), and white is Hot (＞40℃/104℉). Breastmilk storing bags with double-sealed side seams ensure 100% No leak. Milk import/export separation design ensures that there is no contamination, clear division of labor. Can be laid flat or upright for easy storage and spece saving. 180ml capacity one bag for one meal. 50 count.