My LO is using cheapie bottles. He takes 2-3 oz every 2-3 hours right now. But he is a big boy.
We tried him on the Nuk bottles. He had the 0+ month, slow flow nipples, but they were too slow for him.. he was sucking forever and ever and not getting enough. Like, he was literally sucking until he wore himself out and fell asleep on the bottle; and wasn't even getting 1oz!! We went and bought some 0+ month, medium flow nipples (because the fast flow holes looked HUGE!

) but haven't used them yet.