I use cheapies. Just regular store bought bottles and teats. I do however un-screw them ever so slightly just before a feed so air can get into the bottle and replace the milk. I had Avent, but it did not really make a difference with dd.

BTW ds is windy like no tomorrow. It does not bother him, he just lets rip ... and then his sister gets the giggels: "He blew wind, he blew wind!!"