Sippy Cup Conversion Kit for Nanobébé Flexy Silicone Baby Bottles | 2-Count | with Soft Silicone Sippy Spout Nipples, Weighted Any Angle Straw Ball and Straw Cleaning Brush | Spill-Proof (Sippy Spout)

Worked really well with our nanobebe bottles that weren't ready to be thrown out yet. This is a great way to transition from bottle to sippy cup. They don't leak and can be drunk from any position. If you have newish nanobebe bottles and a 12 month old I would definitely buy these. They're a little bit annoying to wash because of the small pieces, but that's what is weighted so your child can drink from any position.

Our little one really likes these. They fit and work good. The problem is there is this small part at the top of the straw where it meets the nipple and unfortunately it's extremely easy to lose when you're washing them and once you lose that tiny part you can no longer use the weighted straw so now we have two we can't even use.

My granddaughter loves them

Edit: many thanks to the seller for reaching out directly for a refund given this item didn’t work for me! Great concept so I hope it works for others.I bought this for the sole purpose of them being compatible with the nanobebe bottle. They aren’t. They “fit” but dont screw on, causing the top to unscrew often and spill milk everywhere. I wish these were worth it so us moms wouldn’t have to splurge on more baby gear, but they’re just not.

I was excited to use this to convert all of our bottles to sippy cups. While it was easy to use and clean, it wasn't a perfect fit. Our 12 month old was able to figure out how to pull it off of the top of the cup essentially making it an open cup that she dumped everywhere within minutes of using it. Under close supervision however it works as it should.