For whatever reason my 11 week old feeds best from the ready-to-feed bottles (like the ones you get from the hospital) that come with the latex-like nipples. We are 99% sure that it’s the actual nipple he likes since we’ve tried feeding powdered formula from the little bottles and he takes it no problem. It feels pretty wasteful to buy the ready to feeds for an entire year. So I’m wondering if there are any bottles that the nipples will work with? These are the nipples I’m talking about, for reference.