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Straw Cup Conversion Kit for Philips Avent Natural Baby Bottle
What’s Included
• 2 Straw Top Nipples – Soft silicone spouts for gentle sipping (cross-cut)
• 2 Weighted Silicone Straws – 100% silicone design ensures no plastic touches the liquid
• 2 Bottle Handles – Helps babies grip and hold independently
• 2 Cleaning Brushes – Keeps the straws and spouts hygienic
Why Parents Love Our Conversion Kit
- Effortless Transition – Helps babies learn to drink from a straw while keeping the comfort of their trusted bottle.
- Planet-Friendly & Cost-Saving – Reuse your baby bottles instead of purchasing all-new sippy or straw cups.
- Independently Tested for Safety – This product has been tested and passed U.S. Consumer Product Safety Commission (CPSC) standards, ensuring it meets the highest safety requirements.
- 100% Safe for Babies – Made from BPA-free, phthalates-free, lead-free, and food-grade materials that comply with FDA food-contact regulations (21 CFR 177).
- No Plastic Touches the Drink – Unlike other brands with plastic weighted straws, our all-silicone weighted straw ensures that only soft, food-grade silicone comes into contact with your baby’s drink.
- Mess-Free Design – Spill-proof straw with a weighted any-angle ball lets your baby drink comfortably at any position.
- Easy to Clean – Includes a straw brush for quick and thorough cleaning.
Compatibility
Philips Avent has 2 types of baby Bottles:
1.) Natural Baby Bottles
2.) Anti-Colic Baby Bottle
This kit is ONLY Compatible with the Philips Avent NATURAL Baby Bottles.
Please check out our store to find the conversion kits that are compatible with other Baby Bottles such as the Philips Avent Anti-Colic Baby Bottles, Comotomo and Nanobebe.
Make the Transition to a Straw Cup Easy & Safe!
Our Straw Cup Conversion Kit is designed to help your little one transition from baby bottles to independent drinking with ease. Instead of buying new cups, simply replace the existing nipple with our soft, spill-proof straw top, making weaning a breeze while reusing your baby’s favorite bottle.
Give your baby a safer, easier, and mess-free transition with our all-silicone weighted straw cup kit! Upgrade your baby’s bottle today!
CPSC Certified for Your Baby’s Safety
At BelBeyo, your baby’s safety is our top priority. Our products are independently tested by Eurofins, an internationally accredited and CPSC-approved third-party laboratory, recognized for its excellence in product safety testing. This ensures compliance with the strict safety standards set by the U.S. Consumer Product Safety Commission (CPSC). Made with BPA-free, Phthalate-free, and Lead-free materials, our products provide parents with trusted quality and peace of mind.
Lab Tested – Meets Food-Contact Safety Standards
At BelBeyo, your child’s safety is our top priority. Our products are independently lab tested to ensure they are made with materials that comply with FDA food-contact regulations (21 CFR Part 177). Designed with food-grade materials, our products deliver a safe, parent-trusted experience.
Certified Small Business – Proudly USA-Based and Parent-Founded
At BelBeyo, we’re a certified small business, proudly USA-based and parent-founded. As a family-run company, we not only design every product with care — we use them daily with our own children. While our products are responsibly manufactured overseas, all operations, product design, and customer support are handled right here in the United States. When you choose BelBeyo, you’re supporting a small business that truly understands and shares your parenting journey.
jade
Reviewed in the United States on February 23, 2025
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
Grace
Reviewed in the United States on February 22, 2025
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.
Jessa
Reviewed in the United States on February 11, 2025
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.
Monique Brentlinger
Reviewed in the United States on January 13, 2025
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.
Scott Johnson
Reviewed in the United States on December 28, 2024
My son was phasing out the bottle but I rather him drink out of a straw in a glass bottle. This conversion kit was perfect. Super easy to clean with the brush they send you. It doesn’t leak and fit the bottles perfectly. These are the best!
Kindle Customer
Reviewed in the United States on October 28, 2024
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.
Jennipher
Reviewed in the United States on January 4, 2024
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.
Melissa S.
Reviewed in the United States on November 30, 2022
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!
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