- 2 Slow Flow silicone nipples
- 1 silicone sleeve (4oz or 8oz)
- 1 cap for metal mason jar ring
- (Jar and metal ring not included — this kit is designed to work with mason jars you already have)
- Converts Regular-Mouth Mason Jars into Baby Bottles — Reuse compatible jars you already own instead of purchasing an entirely new bottle.
- Breast-Like Silicone Nipple — Designed to support a comfortable, natural latch.
- Built-In Dual-Valve Ventilation — Helps reduce swallowed air without separate valves or inserts.
- Protective Silicone Sleeve — Adds cushioning and a comfortable, non-slip grip around the glass jar.
- Simple, Reusable System — Swap components as your feeding and storage needs change.
- Available for 4oz + 8oz Jars — Choose the sleeve size that matches your regular-mouth mason jar.
- Dishwasher Safe — Included components are designed for convenient everyday cleaning.
- Made Without BPA, BPS, PVC, Phthalates, or Lead — Thoughtfully selected materials for everyday feeding.
PRODUCT INFO
FEATURES
- Converts Regular-Mouth Mason Jars into Baby Bottles — Reuse compatible jars you already own instead of purchasing an entirely new bottle.
- Breast-Like Silicone Nipple — Designed to support a comfortable, natural latch.
- Built-In Dual-Valve Ventilation — Helps reduce swallowed air without separate valves or inserts.
- Protective Silicone Sleeve — Adds cushioning and a comfortable, non-slip grip around the glass jar.
- Simple, Reusable System — Swap components as your feeding and storage needs change.
- Available for 4oz + 8oz Jars — Choose the sleeve size that matches your regular-mouth mason jar.
- Dishwasher Safe — Included components are designed for convenient everyday cleaning.
- Made Without BPA, BPS, PVC, Phthalates, or Lead — Thoughtfully selected materials for everyday feeding.
INCLUDES
- 2 Slow Flow silicone nipples
- 1 silicone sleeve (4oz or 8oz)
- 1 cap for metal mason jar ring
- (Jar and metal ring not included — this kit is designed to work with mason jars you already have)
WE'RE IN THIS TOGETHER
At Mason Bottle, we understand that your baby's health is your top priority - so we have made it our's too. That's why all our products are made from non-toxic materials that are free from harmful chemicals like BPA, BPS, Phthalates, and Lead. Meaning, you can spend more time soaking in the precious moments, knowing that every sip and bite your little one takes is safe and healthy.
PRODUCT REVIEWS
Customers praised this eco-friendly DIY kit for transforming existing jars into bottles, noting easy cleaning and versatility. Many said babies accepted the nipple well, and loved reducing plastic use. Some found tops difficult to remove after refrigeration, and a few mentioned concerns about pricing, nipple flow options, and jar weight.
- 5 stars: 133 (86%)
- 4 stars: 13 (8%)
- 3 stars: 4 (3%)
- 2 stars: 1 (1%)
- 1 star: 3 (2%)
I had to buy multiple nipples for the different flows because there wasn’t a way to select a different nipple flow with the original set up. It was extremely difficult to find an 8oz mason jar that fit the nipples. On top of all of that, my daughter can easily pull the nipples out of the sealed mason jar & then milk/water just goes everywhere. I loved the general idea of this but sadly will be returning this product & our hunt for a bottle continues.
I haven’t used these yet because my baby is due in the fall. I love the design and the idea behind it. I already had the glass jars and I feel better using glass every instead of plastic. Thank you Mason co. For making this option!
So easy to use, clean and store! Best bottle so worth the money and way better then even more expensive bottles we have used! So glad I found this- only complaint is the silicone sleeve is a little difficult to put on but overall 10/10
I am the buyer it was gift for someone else Track your package to send this to them in about 6 months!
These are so convenient. I love products that reduce my plastic consumption and my baby’s plastic exposure. These work seamlessly with jars we already had and are that much easier to work into our kitchen/dish routine. It did take our baby a little time to adjust to the weight of the jar instead of a plastic bottle, but after a couple uses she confidently holds the bottle herself.
These tops are great-- I use them for both 4 and 8 oz bottles. Haven't used the bottle sleeve 7+ months in; it hasn't been necessary. The tops can be really difficult to take off after they've been in the fridge; making it hard to remove the metal ring and microwave them if that's your thing. My mom can't take the tops off, and sometimes my husband and I struggle too. I don't know if that's a problem with the tops or just how it goes. Overall I find these very handy-- store milk or formula in the bottles, heat them up, and pop on the top! I do think it's a bit pricey considering you can get 3 full bottles (bottles, tops, covers, nipples) for less than $20.
Overall love that I can use these with my jars!
We love this! It is so easy to make our useless glass jars useful for our 14 month old! I was worried that it may be too heavy for her, but she loves it and has no trouble managing it herself. She's dropped it a few times already, and the silicone certainly works to keep the glass from breaking! Super impressed with the quality, the lid is awesome and attaches securely, and we have had no issues with leaks! Will be buying more of these so we have extras and for our next baby!
The silicone sleeve slips in easily and then stays on, no slipping about. Makes it very easy to use and to wash with the sleeve on. The cap clips down nicely as well and us secured. You need to make sure the nipple is fully popped through the top of the metal ring and that the ring is screwed on securly, if you do that you'll have no issues. Easy to use and clean and a nice way to use existing jars!
This was extremely overpriced for what comes in the kit.
This was extremely overpriced for what comes in the kit.
Such a cute color, baby loves the nipple and so convenient to just use the jars I already had around the house no need to purchase expensive glass bottles .
Awesome product! So glad I can use jars that I already have and only have to attach the nipples. What a cool idea!
The sleeves and nipples fit perfectly on mason jars we already had and our baby took the nipple no problem! Great idea, well executed.
Awesome product! So glad I can use jars that I already have and only have to attach the nipples. What a cool idea!
Great when my baby used them
Great when my baby used them
Great quality, would be cool if sleeves came in different colors
Purchased as a gift for my sister. She is very excited to get to use these in the upcoming months! We tested them out with mason jars and metal rings that we had on hand and the fit is perfect!
Can’t wait to use them! I love that they’re more eco friendly than plastic bottles
Was a great find. Our baby took right to the nipple with no issues. It’s a great system
I've bought this in anticipation of babies arrival so can't say for sure that it's great once in use. But I already like that it has measurements on the sleeve itself and is easy to get over the jar (especially in comparison to the 4oz size which was harder to get on). Wish the sleeve came in more colours and would be good if you could choose different nipples for the DIY pack, i.e. be able to choose the medium or fast flow rather than only coming with the slow flow ones.
although we do have to go up in the nipple flow, our baby love these bottles AND took to the nipple without hesitation. Great overall!!! Would highly suggest.
I absolutely love love LOVE these mason bottles. They're literally the best bottle out there. I hated glass bottles but love these. I only drank from mason jars as cups growing up, so having my son use them as bottles judt reminds me of when I was a kid. The only thing I wish we could do is pick what size bottle nipple we want with the DIY kit. And that since it comes with 2 nipples I wish it came with 2 lids.
No dangerous chemicals and my baby loved the nipple!
Pretty good
The first and so far only time we tried to use our mason bottle diy kit was a complete mess. The milk flowed way too fast for a brand new baby. She is now 5 weeks old so we may try again soon.
I am excited to try these bottles.
We LOVE our mason bottles! So easy to wash and perfect for a minimalist kitchen. Everyone who sees the bottles does a double takes and asks if it’s a mason jar…yes, yes it is.
I love these bottles!! I wish I would have found them a long time ago. I use mason jars for everything so using these for bottles simplifies my life. I was worried my son wouldn’t like these but I really wanted them to work. He took to them really fast which surprised me. I also love that they are made in USA. That means a lot to me and I love supporting this company.
The mason bottle is so easy to use and clean. My son loves it as well!
This was our first time using a glass bottle and love how we can use our own Mason jars, makes it very affordable. Baby took the bottle no problem. Love this sustainable and healthy option. Wish I knew about this with my previous babies.
