We use the standard mouth bottles (i.e. not the wide mouth) and this basket will hold rings, caps, and nipples for eight bottles at a time. You can squeeze a few more nipples and rings in if you have to. Don't put the rings and the caps in the same section as you will end up with a ring jammed inside a cap. Its been useful but I recommend buying two. One in the sink to fill while the others running through the dishwasher.

I've used it a couple times--unfortunately the nipples did not come clean, presumably because the below basket was too full. I will continue to use it and just make sure the lower basket has the bare minimum in it--all caps, lids, etc will be located elsewhere in the dishwasher. I wish it was more useful than it actually is, but at least it secures the bottle nipples in place. I was so tired of hand-washing bottles!!

My wife and I are beyond thrilled to not have to hand wash baby bottles and pump parts every night anymore! Items stay in place and it fits in the top rack of our new dishwasher perfectly. The holes are big enough to fit the nipples on MAM pacifiers but narrow enough so smaller items like pump valves and plastic plungers/syringes won't slip through. We use Lansinoh and Medela bottles and there is plenty of room for several collars/lids in the bottom basket while putting the nipples (which are very different in size) in the top. They don't fit in the holders on top like other brands might, but they rest inside the top section without moving.

We had the old version of it and it wore out so we bought this. They added basket room (which makes it more awkward to make fit in the top rack). They also lost 3 straw slots. While it's a down grade in usefulness it is still useful (we use it every day). I just wish they wouldn't have changed a good thing.

This is a great basket! I've used 2 original munchkin baskets since my son was born 3 years ago, but I needed more room now that I've got an infant and toddler. The high capacity is only slightly wider and longer than the original, and the amount of interior space is not much more than the original - this is why I gave 4 instead of 5 stars.
More important for me was the nipple space on the top. The divider can be moved higher or lower to accommodate more kinds of nipples - I've used Avent natural and dr Browns. With avent, only 5 fit in the original basket. Dr Browns, I could squeeze 6. In the high capacity basket, I can fit 8, and they can be squeezed through the top instead of having the basket open. I didn't think I'd care about that, but it's become a nice feature!
With all of the dr. Browns bottle parts, I can fit a bit more in the high capacity. For me, room for nipples is the biggest necessity so being able to get 8 per basket, per wash is huge. I would absolutely recommend this basket - I'm actually waiting on my second one to arrive!