Are you a Willow 1.0 pump user frustrated by the high cost and environmental impact of disposable milk bags? This hack offers a clever and affordable solution using Kiinde bags to create a reusable pumping system. Tired of constantly buying expensive replacement bags and contributing to landfill waste? This simple modification allows you to directly pump milk into reusable Kiinde bags, significantly reducing your expenses and your carbon footprint. Say goodbye to the hassle and expense of disposable bags and hello to a more sustainable and budget-friendly pumping experience.This detailed guide provides a step-by-step tutorial on how to adapt Kiinde bags for use with your Willow pump. We'll walk you through the simple process of modifying both the Kiinde and Willow bags to create a seamless connection, allowing for direct pumping and eliminating the need for messy transfers. Learn how to save time, money, and the planet with this innovative and easy-to-follow hack. Get ready to embrace a more economical and environmentally conscious approach to breastfeeding your little one.
Pros And Cons
- Cheaper than Willow bags
- Reusable
- Screw-on top, like a bottle
- Stand up on their own when full
Read more: Top 10 Breast Milk Storage Bags 2017: A Comprehensive Review
The Problem: Willow 1.0 and Container Compatibility
Many pumping mothers face challenges with the Willow 1.0 pump's incompatibility with reusable containers. The newer containers are only compatible with the Willow 2.0, leaving Willow 1.0 users with limited reusable options.
Disposable bags are expensive and not environmentally friendly. Finding a cost-effective and sustainable alternative is a major concern for many pumping moms.
This hack offers a solution for those seeking a reusable option compatible with the Willow 1.0 pump, addressing both cost and environmental concerns.
Introducing the Kiinde Bag Hack
This hack involves using Kiinde bags as a reusable alternative to Willow's own bags. Kiinde bags are notably cheaper than Willow's disposable bags, making them a budget-friendly choice.
The process involves carefully modifying the Kiinde bags and Willow bags to create a seamless connection for direct pumping.
This method allows for direct pumping from the Willow pump into the Kiinde bags, eliminating the need for transferring milk and saving time and effort.
Materials and Preparation
The necessary materials include Kiinde bags, a Willow 1.0 pump (or 2.0), clean scissors, a heat sealer (or a clothing iron), and the Willow pump adapter and bottle pieces.

The Kiinde bags are praised for their screw-on design, similar to bottles. When full, they stand upright which is very convenient.
Links to purchase all required materials are provided in the video description.
Step-by-Step Instructions
First, cut the top of a Willow bag on one side, then seal the cut end using a heat sealer or clothing iron.

Next, cut a straight line across the widest part of the second Willow bag to create an opening.

Attach the Kiinde bag adapter to the modified Willow bag and carefully attach the Kiinde bag.
Pumping and Storage
Attach the assembled Kiinde bag system to the Willow pump and begin pumping.

Once pumping is complete, unscrew the Kiinde bag and cap it for storage in the refrigerator or freezer.

The stored milk can then be easily transferred to a Kiinde bottle for feeding using the included nipple.

Conclusion: Is this Hack Worth It?
This Kiinde bag hack offers a budget-friendly and reusable alternative to disposable Willow pump bags, addressing concerns about cost and sustainability.
The process requires some initial setup and practice, but the resulting convenience and cost savings are significant for pumping mothers.
While it adds a step to the pumping process, the increased reusability and reduced costs make this hack a worthwhile option for those seeking a more economical and environmentally conscious approach to pumping.