He is 2 weeks but since he was 5 days old he takes 5oz every 4-5 hours.

My son is 4 weeks and he drinks about 4 oz to 4 1/2 oz every 3-4 hours... That amount holds him perfectly for that amount of time.

My daughter is almost 8 weeks and she drinks 3 to 4 ounces every 2 to 3hrs.