One of the first questions my friends have asked is ” How long is this milk good for?” The best advice I can give you is – Save the following image:
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You no longer need to pump and dump post drinking. Alcohol metabolizes at the same speed in your milk as it does in your blood. KellyMom even states that the occasional intake of 1-2 drinks is safe for nursing baby. If you are safe to drive, the milk is safe to drink.
If you still have concerns about feeding it to your baby, you can dilute into separate bottles mixing it with fresh milk. Or save it for a milk bath!