Sippy Cup Conversion Kit for Philips Avent Natural Baby Bottles 2-Count Food Grade Silicone Spout Nipples, All Silicone Weighted Straw, Bottle Handles, Cleaning Brush, BPA-Free 4+ months (Sippy Spout)

Works great baby loves them they are easy to clean and easy to use on her already favorite bottles. 100% would recommend to anyone. Zero leaking unless pushing on the sippy part while upside down, super durable.

I think this is well worth the money if you already have a lot of bottles and are looking for an easy way to transfer a young toddler to a straw cup. It fit perfectly with the existing bottle tops and is leak proof. The weighted straw works well.

Tried a couple of straw bottles, but my toddler kept spitting the milk out. This is the only straw that works for him. Fairly easy to clean and fits the Philips natural flow bottles.

Ok, here's a long review but I hope it helpsCons...1. Inner straw is just a thin as the munchkin straw2. Cleaning brush is garbage (I use another brands brush to clean these)3. I feel these are slightly over priced when you take into consideration its only the straw pieces and handle4. I don't really feel like this is a con but people should know... This cup will OCCASIONALLY leak just like any other straw cup. The pressure builds up and milk will slowly push up through the valve. I don't own a single cup that doesn't do this.It's time for the Pros!1. EASIER to clean!! The narrow inner straw can detach from the wider mouth portion of the straw. This feature alone make this cup superior to the munchkin cup. Additionally it's pieces are easy to clean unlike the Dr. Brown straw cups that have extra holes and valves. Technically the thin inner straw on the Advent cups are 3 pieces but I dont seperate the smaller parts for cleaning every time.2. The valve on the outer straw is really close to the top of the straw. My son likes to flick his straws, splattering milk everywhere! The valve being at the top limits the splatter.3. Outer straw is wide and looks like it's more comfortable in his mouth over the narrowness of a Dr. Brown straw cup.4. I CUT the straw down to fit my smaller Advent bottles. I like that the length can be customized to fit my preferred bottle size. Of course you have to cut it just right to make it work. I'm not sure if the brand would recommend this due to possible error but it allows the straw to float right at the bottom like other straw cup brands.5. I'm like the idea of converting my old bottles into straw cups to help reduce plastic waste. Like I mentioned above I do wish these were slightly cheaper seeing how the company is only proving a handle and straw.Things I'm indifferent about...1. I don't like or dislike the handle. They are bulky so sometimes I don't add them if I'm taking this cup in a diaper bag. But they are way easier to use over silicone handles.2. Sometimes the straw nipple is hard to get in the ring... it takes 3 extra seconds of effort but it's really no big deal as long as I slow down and focus.

We bought the glass Avent Natural bottles, and on mylittle quest to find a sippyi came across this transition kit, so when Bubba got big enough for a sippy cup, I really wanted to continue his glass bottle since we spent $40/3 and this has been a HEAVEN SENT and so cost effective!! I RECOMMEND THIS! Also, they're super easy to clean and steralize! We switch them out every other day and let the one being cleaned sit in some vinegar and it comes with two mini brushes that get the small spaces. So so good! They do leak a little, but honestly it's not so bad. It's really handy that they learn to drink like a straw in this or if they lay down its still usable due to the weighted ball design! As a mom of 4 this is worth it, and we definitely will do this with our next kid as well!

I loved these converter kits and after trying them out for a few days, actually bought another set so I could have them in rotation. They worked great for about a month, but then the rubber tube/straw that connects to the nipple has stretched out and falls off constantly, rendering the bottle unusable. I clean it off, dry it, and put it back on snugly and it immediately slides off again! It is so frustrating and confusing for my baby who can no longer get any milk to come out. I also only hand washed these so I never exposed them to extreme heat that might affect them. I wish they worked better because they are my daughter’s favorite sippy.

fits the regular phillips advent glass bottles that i got and i love it i dont have to buy a new sippy cup for a while. good price for 2. the weight keeps the straw down and its easy to clean. also bought a silicone sleeve for the glass bottles and 10/10 recommend both products

Pretty cool kinda hard to get the first time but he finally got it