Features FDA approved materials used, perfect for safe and extended freezer storage Medical grade sterilization to ensure safe feeding - European standard BPA Free Double walled to preserve nutrients effectively Thick laminate to prevent ink leeching DOUBLE zipper top to prevent leakage No-spill self-standing bottom Heat sealed sides to prevent splitting Easy to read designated area for date, name and time Pre-calibrated ounce/ml markings for accurate measuring #autumnz #ziplock #babysense