Dr. Brown's Natural Flow Options+ Wide-Neck Baby Bottle Conversion Kit, 9oz

It was such a relief to find this kit; the vent system works perfectly again on my favorite bottles, and the 9oz size is ideal for my baby’s bigger feeds now.

I’d been missing the vent system on my original bottle, so this kit was a lifesaver—the nipple and collar fit perfectly and no more leaks. Easy to swap out the old parts, and my baby took right to them again.

Finally found a replacement for the lost nipple and collar on my favorite bottle, and this kit fits perfectly — even the vent system clicks in just like the original. It's great to have spare parts on hand without buying a whole new bottle.

We bought this conversion kit to replace the lost vent insert, and the pieces fit our existing Options+ bottles exactly. The wide neck is much easier to fill and clean than the standard narrow ones we tried before.

We lost the little straw piece from the original bottle, and these replacement connectors fit perfectly and click in securely. The 9oz size is great now that she’s taking bigger feeds.

The vent system on these is just as effective as the original bottles, and my baby's colic has been much better since I switched. Having extra nipples and collars on hand makes late-night bottle prep so much easier. Exactly what I needed to refresh my stash without buying whole new bottles.

Switching to the conversion kit saved me from buying a whole new set after I lost the vent insert. The wide neck makes it much easier to scoop formula into without spilling everywhere.

My 9-month-old was chewing through the old nipples, and this kit let me replace everything without buying a whole new set of bottles. The vent system is the exact same design, so my little one didn’t even notice the swap.

Switching between bottles is so much easier now that I have extra vent inserts on hand. The wide neck makes filling and cleaning quick with no drips, and the 9oz size is perfect for my growing baby.

I've been using these conversion kits to replace the nipples on my 9oz bottles, and the level 1 flow is perfect for my newborn's feeding pace. The silicone is soft but holds up well to daily sterilizing.