Yes, breat is best. BUT all of us can't breastfeed for extended periods of time. For various reasons. Going back to work. Milk is drying up. Etc. Etc.
My daughter also refused to take bottle (wanted to start giving water or rooibostea in summer as extra fluid) when se was a baby. I breastfed her up to 10 months, in which time she refused to take a bottle or sip-cup (no matter what brand/ shape etc). Just mummy's milk. In this time I built up a fair collection of bottles/ teats of shapes and brands. And it cost a lot of money too. At 10 months, my milk dried up. So she had to move over to bottle. Finish and klaar. At that young age they still do need to suck. One morning it was it. It was after a night of almost continuous breastfeeding. And the days didn't went even better. No more breast. It was February and it was hot. She fought the bottles. All the shapes and brands. And Mommy's foot is firm down: no more breast. And to be very honest, it was not easy. At that stage my husband was out of town for work too and there's is an older brother who need also attention. Eventually (around noon !! after the last breastfed was at sunrise) she accepted the curity teat (those old fashioned shaped one with the "wings", I used the silicone ones). It was a relieve. Took a while before she drank easily form the bottle. But she learned that quickly. And guess what.....? 2 years later it was a battle of another kind....again in February's heat....... to get rid of the bottle. Got that done and over with too. (Oh, she's turning 6 end of this week)
Goodluck for you who battle to get the little ones to accept the bottle. Just persevere. Don't give up after the first try. Try in a while again...and again. Soon they will realise that liquid coming from the teat will help relieving the hungry and thirst. You are the mom and act in the best interest of your baby. As I said at the start of my post, all of us can't breastfeed for extended periods of time. So, no need for guilt when moving over to bottle. Enjoy your little ones. they grow up far too quickly.