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FREE SHIPPING ON MOST ORDERS OVER 🇺🇸 $99 or 🇨🇦 $150

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ENJOY OUR REFRESHED SITE, PLEASE BE PATIENT WITH US AS WE'RE STILL A WORK IN PROGRESS

ENJOY OUR REFRESHED SITE, PLEASE BE PATIENT WITH US AS WE'RE STILL A WORK IN PROGRESS

ENJOY OUR REFRESHED SITE, PLEASE BE PATIENT WITH US AS WE'RE STILL A WORK IN PROGRESS

ENJOY OUR REFRESHED SITE, PLEASE BE PATIENT WITH US AS WE'RE STILL A WORK IN PROGRESS

ENJOY OUR REFRESHED SITE, PLEASE BE PATIENT WITH US AS WE'RE STILL A WORK IN PROGRESS

ENJOY OUR REFRESHED SITE, PLEASE BE PATIENT WITH US AS WE'RE STILL A WORK IN PROGRESS

ENJOY OUR REFRESHED SITE, PLEASE BE PATIENT WITH US AS WE'RE STILL A WORK IN PROGRESS

ENJOY OUR REFRESHED SITE, PLEASE BE PATIENT WITH US AS WE'RE STILL A WORK IN PROGRESS

ENJOY OUR REFRESHED SITE, PLEASE BE PATIENT WITH US AS WE'RE STILL A WORK IN PROGRESS

ENJOY OUR REFRESHED SITE, PLEASE BE PATIENT WITH US AS WE'RE STILL A WORK IN PROGRESS

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Mason Bottle Plastic Cap for Mason Bottle

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The Mason Bottle Plastic Cap will fit over the metal ring on any regular-mouth mason jar. The cap prevents leakage when secured over the Mason Bottle Silicone Nipple. When you’re on the go, the cap will protect the nipple and keep it sanitary too.

This product includes one polypropylene plastic cap.

100% Made in the USA

You Might Also Like

The Original Mason Bottle or the Mason Bottle DIY Kit, if you're looking to add nipples or a sleeve to your order.

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Free Shipping

Free Shipping on most orders over $99 USD and ~$140 CAD

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Safe Delivery Guaranteed

We'll replace or refund any broken arrivals—though it's a rare event!

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Hassle-free Returns

Shop with confidence! Easy returns on eligible items.

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Expertly Packed

Every order is carefully packed to ensure safe arrival.

Meet the Maker

Hi, I’m Marie, the heart (and muscle) behind Mason Jar Merchant. For me, mason jars are so much more than containers! A gift of beautiful vintage jars from my husband’s grandmother sparked a personal love for these versatile jars that quickly grew into a passion and I love sharing their possibilities with others.

As my collection grew, so did my creativity. I began crocheting cozies, painting lids, making custom straw tops, and of course, mason jar tumblers.

Today, Mason Jar Merchant is about more than jars—it’s about empowering people to live healthier, more sustainable and resilient lives.  Every product we offer, from vintage jars to lids, tumblers, and accessories, is chosen with the hope that it inspires you to reduce waste, eliminate plastic, and embrace the simple joy of practical beauty.

Customer Reviews

Based on 1 review
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Caitlin M. (Denver, US)
Lids don’t fit plastic round piece for bottles

Unfortunately the baby bottles have a flaw. The gray plastic heads don’t fit the nipple lids. The lids will fit with a traditional silver head but not with the plastic ones made for the baby bottles.

Hi Caitlin, We've tried several interchanging pieces from the Mason Bottle line, and they all work together for us. If you'd like to drop us an email or use out chat line we'd love to help you figure out what's going on and walk you though putting these pieces together.

Cheers,

Jenny M.
Customer Care