How many oz is normal for an 11 month old?

Je

My newly turned 11 month old started refusing his daytime bottles last week so I've been giving him formula in a sippy cup but he drinks less this way. I compensated by adding in an extra snack. In total he drinks about 18-20oz (he used to take 24oz) of formula a day and eats 3 meals and 2 snacks. Is this ok? I give him water in between the meals and he will take usually 4-5oz of that through out the entire day.