The formula adds volume so it will look like more x
As others have said it’s water displacement due to the formula powder. We are on 7oz bottles (we use Mam with a perfect prep machine) and they all come out nearly to 8oz.
Thankyou girls, couldn’t really find an answer online so I’m glad you have cleared that up for me it was driving me mad😂🫶🏻
We're using the exact same combo and over 9 months of using it we've learned that with the prep machine... "4 oz" = 130ml "5 oz" = 170ml "6 oz" = 200ml "7oz" = 230ml "8 oz" = 260ml
Just water displacement, the formula will add more volume, a bit like someone sitting in a bathtub, them sitting causes the water to rise but its still the same amount of water in the bath 😀