eufy Breast Milk Storage BagColor Changing Technology for Instant Temperature Clarity: See your milk's temperature at a glance. Purple means too cold, white means too hot, and blue means just right for feeding. Strong Seal, No Leaks: Pre sterilized, thickened milk bags with double sealed seams and double zippers to protect milk. To seal, press with your fingertips until you hear a click. Large Capacity for Worry Free Storage: Hold up to 7 oz of milk per bag, cutting down on bag