Does formula fill a 1 year old up?

[xx200xx]

Hello,
So my son is 15 months and still drinks formula, he will refuse to drink the other milk. But recently I'm buying formula and he's wasting a lot of it. I'm wondering if it fills them out or not? Or to try and transition to the other milk?
I know he will drink full fat milk as he has before but sometimes he will refuse it.
I don't want him going to bed hungry ? He does eat 3 meals thought out the day also.
Is it worth not buying formula again?
I can't mix both eitehr as he won't drink it...

Babies don't need formula after 1. If he dosent like cows milk can you try oat?

Formula is unnecessary after 1. Cows milk if he wants it, my daughter didn't want any very often and still doesn't (she's 3) she gets calcium through yoghurt and cheese so it's fine.

They don't need milk to go to bed with, at that age it's just a drink not food. Long as they are eating fine in the day you can skip it completely and formula is just a fad at that age they don't need it.