Frequently Asked Questions

Questions About Your Order

Yes, we ship all over the world. Shipping costs will apply, and will be added at checkout, but we definitely understand that international shipping can be expensive, so we always offer 20% off on international orders to help offset the shipping cost. Just use the code INTL20 for 20% off of your entire order! 

For overseas deliveries, we recommend allowing 3-4 weeks for your order to arrive. Delivery details will be provided in your confirmation email.

Most orders ship out within 24 hours, except on weekends and holidays.

We only offer USPS shipping options which can take 3-8 business days to arrive. 

If you need your order quickly, all of our products are available for 2 day shipping on Mason Bottle's Amazon store.

USPS is our primary shipping carrier.

If your order is stating it is delivered but you didn't receive it, we recommend contacting your local post office and inquiring about the missing package. Please send us an email at or submit a "Contact Us" form within 24 hours of your package stating "delivered". Thankfully, technology has advanced so their scanners will track GPS coordinates and they are able to usually retrieve a mis-delivered package or locate it otherwise. However, we understand this is not always the case and that is why our protocol for missing packages is to reship the order or provide store credit if USPS is unable to locate this package.


We’ve checked the return policies of all the major bottle brands, and as far as we can tell, Mason Bottle is the only brand with a money-back guarantee.

All other bottle brands only accept returns on un-used and un-opened products. But how can you know if bottle really works for your family without trying one first?!

You can’t. So we decided to create a new policy that puts families first.

Questions About Mason Bottle

At Mason Bottle, we believe healthy doesn't have to be high end. Since glass baby bottles can be expensive, we knew making a bottle compatible with mason jars would help families save money, especially if they already have jars at home. Mason jars are also a cleaner and more cost-effective alternative to breast milk storage bags. Simply store breast milk in a mason jar, then add the Mason Bottle nipple to turn it into a bottle.

The width of a mason jar lends itself perfectly to a breast-like nipple shape that is easier for babies to latch onto. What is it about the wide nipple? We can't say exactly, but we can tell you that we have shipped nearly 1000 orders, and have yet to hear a report of a baby rejecting our nipple. If your baby didn't take to our nipple, please let us know at We'd love to see if we can help. 

Mason Bottle is 100% Made in the USA! 

When you look at the top of the nipple, you can tell which size it is by the pattern of the holes: 

View a visual diagram here

Slow Flow: 1 Hole

Medium Flow: 2 Holes in a Straight Line

Fast Flow: 3 Holes in a Triangle Shape

Flexible Flow: Y Shaped Cut

Yes! All of our products are dishwasher safe, but if you are using the metal lid and band, we recommend rinsing and thoroughly drying these pieces to extend their life. 

We recommend cleaning the bottle before first use. To sterilize the nipples, simply boil them in water for 5 minutes

Mason Bottle products are designed to work with any regular-mouth mason jar, and should never leak. We haven't had any reports of leaking thus far, but if you experience this, be sure to let us know so we can help you out at

Yes! The Maymom adapter from Spectra lets you pump directly into the mason jar.

All of our nipples are designed with our FussFreeTM Ventilation System. This dual valve system allows air to be taken in and milk to flow smoothly out with no air bubbles to help prevent gas and colic.

Bonus: Our system is flawlessly built into the top of the nipples, so no special tubes, collars, bags or extra pieces needed!