not interested in his bottles?

My 12month old has just decided he doesn't want anything to do with his bottles. I am slowly changing over to cows milk from formula and he doesn't really want a bar of either????

He will have a little and then just push the bottle away, he is eating very well and it doesnt really seem to be bothering him. So i am thinking that he is just getting his fluids from his food. I have tried giving him water in a bottle & sippy cup and not really intrested in having water either - doesnt like the taste and just bangs the sippy cup on his high chair tray. He does drink it a little though. I am persevering with the water as i know its quite important.

Should i be worried about him not wanting fluids/bottles? Or is this maybe just a fussy stage?

Thank you

my DD is a few months older and we r goign through the same at the mo. but she does drink alot more water so i am not to worried.
i would just try to keep the water going.
it wasnt until we found a sippy cup she liked that she drank the water so maybe try a few dif ones.