Quick Facts
Plastic cap that snaps onto standard metal mason jar rings to protect nipples and keep baby bottles clean, not compatible with stainless steel jar rings.
Best for
Parents using bottles with metal mason jar rings.
Key detail
Non-toxic plastic
Consider if
Consider something else if you use stainless steel jar rings.
Shipping
Free US shipping over $100, 30-day returns
Snap-On Cap for Mason Jar Rings
Keeps the nipple clean and snaps securely to standard metal mason jar rings for simple, ready-to-feed bottles.
Snap-On Cap for Mason Jar Rings
Clean, Safe Material
Clean, Safe Material

Made from high-quality, non-toxic plastic to keep the nipple covered and hygienic between uses. The flush, easy-clean shape reduces places where milk can collect.

Snap-On, Parent-Friendly
Snap-On, Parent-Friendly

Designed to click into standard metal mason jar rings so you can assemble a bottle quickly. The simple snap action makes switching nipples and jars fast during feeds.

Secure Fit, Travel Ready
Secure Fit, Travel Ready

Snaps into place to help prevent spills and keep the nipple protected when you are on the go. Always check the seal and carry upright for best results.

Secure Fit
Snaps onto standard metal mason jar rings for a reliable hold during feeding.
Non-Toxic Plastic
Made from high-quality, non-toxic plastic that keeps the nipple covered and hygienic.
Quick to Use
Simple snap-on design makes assembly and cleanup faster for busy parents.
Shop with Confidence
Ships from a US warehouse with human customer support and easy returns.
How to Choose a Cap for Mason Jar Rings

A few practical tips to pick the right cap for your jar-based bottles.

  1. Check ring type: This cap fits standard metal mason jar rings. It is not compatible with Mason Bottle stainless steel rings, so confirm your ring style first.
  2. Think about cleaning: Wash before first use and after each feeding with warm soapy water. Inspect the cap regularly for signs of wear or damage.
  3. Plan how many: Keep an extra cap or two on hand for daycare, travel, or the wash cycle so you always have a ready bottle.
  4. How you will transport: The snap-on design helps protect the nipple during transport, but carry bottles upright and check seals before packing.
  5. Match nipples: This cap covers the nipple and works with a wide range of baby nipples, but confirm fit visually when you assemble your first bottle.
Frequently Asked Questions
Will this cap fit my mason jar rings?

Yes, it is made to snap onto standard metal mason jar rings. It does not fit Mason Bottle stainless steel rings, so check your ring type before ordering.

What is the cap made of?

The cap is made from high-quality, non-toxic plastic, designed to keep the nipple covered and clean between uses.

Will the cap leak?

The cap snaps securely to reduce leaks during handling, but we recommend carrying bottles upright and checking the seal before travel.

How should I clean and sterilize the cap?

Wash the cap before first use and after each feeding with warm soapy water, then air dry. If you use a steam sterilizer or other method, follow your sterilizer manufacturer's instructions and inspect the cap after sterilizing.

What are your shipping and return policies?

We ship from a US warehouse, offer free US shipping on orders over $100, and accept returns within 30 days. Human customer support is available if you need help.

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