Hygienic Storage Solution: Pre-sterilized to maintain milk purity and designed for single use to prevent contamination. Leak Proof Design: The double zipper seal keeps the contents secure, making leaks a thing of the past. Practical Features: Generously sized bags can hold up to 6 ounces of breastmilk, marked with measurement indicators for accurate tracking. Space-Efficient: The bags are designed to lay flat, making storage in your fridge or freezer more organized and efficient. Convenient-write-on Tab: Located outside the fill area to reduce potential puncture risks and includes space to note the date and volume of milk stored.