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Thawing Frozen Milk

To thaw frozen milk, you can do one of the following:

  1. Put the container in the refrigerator.
  2. Put the container in a cup of warm or lukewarm water.
  3. Run lukewarm water over the container.

Whatever method you choose, keep these tips in mind:


  • Thaw the oldest milk first (REMEMBER: First in, first out).
  • Keep the container sealed.
  • Use milk thawed in the refrigerator within 24 hours (from the time it completely thawed—not from the time you took it out of the freezer).
  • Use room-temperature or warm, thawed milk within 2 hours.
  • Use leftover milk from a feeding within 2 hours after baby has finished.


  • Thaw or heat milk on the stovetop or in a microwave.
  • Refreeze thawed milk.

Warming Refrigerated Milk

Many babies are just fine with drinking room-temperature milk, but some prefer warmer milk. If this is your baby,

  • keep the container sealed;
  • place the container in a pot of warm water for a few minutes, or run warm tap water over it;
  • swirl the milk inside the container to mix the fat that may have separated;
  • test the milk’s temperature by putting a few drops on your wrist (you want the milk warm, not hot).