---
product_id: 1813666
title: "Conversion Kit Compatible with Medela Breast Pumps (Selected) to be Compatible with Avent Classic Bottles, Avant Natural PP Bottle and speCtra Wide-mouth Bottles Thread Changer; w Sealing Rings"
brand: "maymom"
price: "€ 22.28"
currency: EUR
in_stock: true
reviews_count: 13
category: "Maymom"
url: https://www.desertcart.be/products/1813666-conversion-kit-compatible-with-medela-breast-pumps-selected-to-be
store_origin: BE
region: Belgium
---

# 4 conversion rings for versatile compatibility BPA-free & dishwasher safe for safe, easy cleaning 4 sealing o-rings to prevent leaks Conversion Kit Compatible with Medela Breast Pumps (Selected) to be Compatible with Avent Classic Bottles, Avant Natural PP Bottle and speCtra Wide-mouth Bottles Thread Changer; w Sealing Rings

**Brand:** maymom
**Price:** € 22.28
**Availability:** ✅ In Stock

## Summary

> 🔗 Pump smarter, not harder — connect all your favorite bottles effortlessly!

## Quick Answers

- **What is this?** Conversion Kit Compatible with Medela Breast Pumps (Selected) to be Compatible with Avent Classic Bottles, Avant Natural PP Bottle and speCtra Wide-mouth Bottles Thread Changer; w Sealing Rings by maymom
- **How much does it cost?** € 22.28 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/1813666-conversion-kit-compatible-with-medela-breast-pumps-selected-to-be)

## Best For

- maymom enthusiasts

## Why This Product

- Trusted maymom brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Leak-Proof Design:** Includes sealing rings that ensure mess-free pumping every time
- • **Trusted by Parents:** Top-rated with 4.5 stars and glowing reviews for reliability
- • **Compact & Convenient:** Small, easy-to-clean parts that fit perfectly into your busy lifestyle
- • **Universal Compatibility:** Seamlessly connects Medela pumps to Avent, Spectra, Lansinoh & more
- • **Hypoallergenic Materials:** Safe, skin-friendly plastic and silicone for peace of mind

## Overview

The Maymom Conversion Kit transforms your Medela breast pump into a multi-brand compatible powerhouse, allowing direct pumping into Avent, Spectra, Lansinoh, and other popular bottles. Featuring 4 durable conversion rings and 4 sealing o-rings, this BPA-free, dishwasher-safe kit prevents leaks and simplifies your feeding routine. Hypoallergenic and compact, it’s a must-have for modern parents seeking convenience and reliability.

## Description

Compatible with Medela older pump

Review: Exactly what I needed - These fit perfectly with my Philips avent bottles and medela hand pump! This was a perfect way to pump into a larger bottle making storage easier or pumping directly into my babies next bottle. It’s easy to clean and small enough that you can store anywhere!
Review: Work well, no leaks, and I didn't bother using the extra seal/rings. Good products! - A review of the quality: These adapters are great! I haven't bothered with the extra ring/seal, and I have had NO leaks! In the enclosed materials, Maymom notes that they have listened to customers and included the seal rings, but I don't find them necessary. I think this is a quality product, made connecting to my bottles so much easier! Review of why they were purchased: These were purchased to fit my Medela Pump In Style Advanced, or Symphony (PiSA) pumping parts to a Philips Avent storage cup. Works great! My only gripe (and this is not to Maymom- they are fantastic!) is that the Avent storage cups that nestle down when in storage have their own adapter to fit Avent, which means I had two adapters, which seems a bit excessive. Since then, I have moved on to Lansinoh storage bottles, no need for two parts. That said, I think Maymom is fantastic, and I've purchased at least four different types of replacement parts from them!

## Features

- Compatible with Medela older pump (old pump in style, freestyle, swing); for newer pumps (flex, pis with maxflow Pro Pro+), look up ASIN B07MY18RVZ; This product will enable the above flanges to be compatible with Avent bottle, spectra bottles etc.
- Includes 4 conversion rings plus 4 sealing o-rings to avoid many leaking events.
- BPA free, dishwasher safe, retail pack, sealed by manufacturer.
- You can pump directly into Avent bottles.
- Also Adapts to: Evenflo Comfort Select, Ameda Purely Yours, Lansinoh Double Electric, Playtex Embrace, Dr. Brown's Natural Flow Electric/Manual

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00IBZ8ADK |
| Additional Features | Hypoallergenic |
| Best Sellers Rank | #22,338 in Baby ( See Top 100 in Baby ) #291 in Electric Breast Pumps |
| Brand | Maymom |
| Brand Name | Maymom |
| Color | White |
| Customer Reviews | 4.5 out of 5 stars 797 Reviews |
| Global Trade Identification Number | 04713530099050 |
| Item Weight | 1.12 ounces |
| Manufacturer | Maymom |
| Manufacturer Part Number | M017-Rx4 |
| Material | Plastic, Silicone |
| Material Type | Plastic, Silicone |
| Model Number | M017-Rx4 |
| Number of Items | 1 |
| Size | 8 Piece Set |
| Special Feature | Hypoallergenic |
| UPC | 738435627829 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Maymom
- **Special Feature:** hypoallergenic
- **Material:** Silicone, Plastic
- **Number of Items:** 1
- **Color:** White

## Images

![Conversion Kit Compatible with Medela Breast Pumps (Selected) to be Compatible with Avent Classic Bottles, Avant Natural PP Bottle and speCtra Wide-mouth Bottles Thread Changer; w Sealing Rings - Image 1](https://m.media-amazon.com/images/I/515C8AZujCL.jpg)

## Questions & Answers

**Q: I have a spectra s2 pump and meddle bottles. Does this work for wide (spectra) to regular (meddle) collection bottle conversion?**
A: No.  This connects to Medela flange components, but the Spectra's shield/flange thing-y is too wide on the bottom.  I tried to connect it "upside down" but the threadded parts are both on the inside (so like trying to connect two female plug-ends) and it did not work.  I have ALL my stuff out bc I'm putting it away (YAY!) today.Here's the deal that I found worked wonders for me (I exclusively pumped).  I use the Spectra S2 (best thing EVER!!) but I had a ton of Medela stuff and I like that you can pick your shield size.  So I used Medela parts on the Spectra S2.  All you need to do that (and use your Medela bottles) is to buy Maymom's little yellow connectors for Spectra-to-Medela.  Presto- DONE!Another tip-- because I pumped so much, I, like so MANY other moms found that the Pumpin' Pals shields was a life saver.  They don't hurt, and you can lean back.  They go well with the Medela pump parts and Spectra S2 setup, because they just go where the shields went.  On Spectra pump parts, since the shield is part of the flange, I don;t know how they get inserted or if it works well.  But hey, if you've got Medela stuff laying around, those little yellow adapters are super-cheap, consider giving them a try! GOOD LUCK!!

**Q: Does it work with dr brown bottles?**
A: No- not the standard (small) neck bottles.  The skinny end goes into your Medela part that brings the milk from the breast into a container.  This would connect that Medela part to a larger-mouthed bottle.  So, without it, you can hook Medela bottles AND Dr. Brown's skinny/normal-necked bottles.  But by adding this, you can connect your Medela setup to Spectra wide-mouth bottles.  I do not know about Dr. Brown's wide-mouth bottles.

**Q: Do these work with mason jars?**
A: sorry.  No.  this one does not work with mason jar.

**Q: What's the difference with other same products?**
A: It depends which other products.  I'm guessing it's for other sizes of bottles.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Exactly what I needed
*by M***M on June 2, 2026*

These fit perfectly with my Philips avent bottles and medela hand pump! This was a perfect way to pump into a larger bottle making storage easier or pumping directly into my babies next bottle. It’s easy to clean and small enough that you can store anywhere!

### ⭐⭐⭐⭐⭐ Work well, no leaks, and I didn't bother using the extra seal/rings. Good products!
*by A***R on April 15, 2016*

A review of the quality: These adapters are great! I haven't bothered with the extra ring/seal, and I have had NO leaks! In the enclosed materials, Maymom notes that they have listened to customers and included the seal rings, but I don't find them necessary. I think this is a quality product, made connecting to my bottles so much easier! Review of why they were purchased: These were purchased to fit my Medela Pump In Style Advanced, or Symphony (PiSA) pumping parts to a Philips Avent storage cup. Works great! My only gripe (and this is not to Maymom- they are fantastic!) is that the Avent storage cups that nestle down when in storage have their own adapter to fit Avent, which means I had two adapters, which seems a bit excessive. Since then, I have moved on to Lansinoh storage bottles, no need for two parts. That said, I think Maymom is fantastic, and I've purchased at least four different types of replacement parts from them!

### ⭐⭐⭐⭐⭐ adapters work perfectly plus excellent seller communication
*by A***H on February 16, 2020*

I bought these adapters to connect my Avent bottles to my Medela pumping equipment. Of course I am always worried when I buy a 3rd party product, but the reviews are right for this one- they worked with no issues. This is great- I can pump right into a baby bottle and skip the extra step of pumping into a Medela bottle and transferring to an Avent bottle. I try to be picky with my purchases- but I will be saving time spent washing the bottles, save space in my dishwasher (OMG baby items can take up an entire shelf in there!), so these are worth it. I store them with my pumping equipment after washing. As for the seller- I goofed with the purchase and had a question that required communication with the seller. Their response was super quick, and took care of me super quickly. I need other Medela accessories and will be happy to purchase them from the same seller- they offer a bunch of Medela-related supplies! Thank you!

## Frequently Bought Together

- Maymom Conversion Kit Compatible with Medela Breast Pumps (Selected) to be Compatible with Avent Classic Bottles, Avant Natural PP Bottle and speCtra Wide-mouth Bottles Thread Changer; w Sealing Rings
- Medela Manual breast pump with Flex Shields Harmony Single Hand for More Comfort and Expressing More Milk
- Medela Breast Milk Collection and Storage Bottles, BPA Free, 6 Pack, 5 Ounces, Compatible with Medela Breast Pumps

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*Product available on Desertcart Belgium*
*Store origin: BE*
*Last updated: 2026-08-01*