Milk Storage Bag

Hi All,

My son is 2 weeks old now. I EBM and store in the milk storage bag and kept it in the fridge. My son drinks 100ml now, do I just put 100ml or I can fill up the bag full. I will only pour the 100ml for his feed and the balance for his next feed so that I can save cost.

Need advise. Thanks in advance.
 
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