How many bottles of milk should a 17 month old have a day?

My 17 month old is still having 2 bottles of cows milk a day. One in the morning before his breakfast and one at night just before bed. He has about 150ml in the morning and 260ml at night. He really loves his bottle and I dont think he is anywhere close to wanting to drop a bottlle. Just wondering if he is having too much. He doesnt have much other dairy as he wont eat yoghurt or cheese. The bottles are not affecting how much he eats as he is a really good eater. Just wondering what other parents are doing in terms with bottles.