We have used the Playtex nurser for awhile. It is a great bottle. It is probaly one of the brands of bottles that have been around for quite some time. I guess that shows that it must be a decent bottle if it has survived this long. It has been proven to reduce gas and colic in babies. The reason that is because you can squeeze the air out of the liner. You can get it in 4 oz and 8 oz sizes. The nipples are great if you are breastfeeding because they mimic the mother's nipple. So it is a great transition between breastfeeding and bottlefeeding. Its a lot more comfortable to hold because you don't have to hold the bottle straight up in the air to get the milk out.
It is really easy to clean out because it uses disposable liners that you slip into the bottle. All you do is pull that liner out and throw it out when your done. It doesn't hurt to rinse out the liners and reuse them a few times. I think this is one of the reasons that these bottles are so popular.