FDA approved materials used, perfect for safe and extended freezer storageMedical grade sterilization to ensure safe feeding - European standardBPA FreeDouble walled to preserve nutrients effectivelyThick laminate to prevent ink leechingDOUBLE zipper top to prevent leakageNo-spill self-standing bottomHeat sealed sides to prevent splittingEasy to read designated area for date, name and timePre-calibrated ounce/ml markings for accurate measuring