When did you start to change your babys bottle?

For example my baby when she was a new born i used a few brands of course the baby small bottles but i sticked to DrBrown. Now that shes going to be 2 MO she eats more then 2oz. and the Dr Brown still work for her but i want to start getting her the bigger ones.(bottles) i like the DrBrown brand but i seen the bigger ones and theyre kind of thick where you hold it. Also the Avant bottles i feel like those are super big too lol idk. Maybe I'm looking for a not to huge bottle? Any suggestions? Or maybe im just used to those baby bottles 😂😂

Umm any bottle brand you recommend?