Willow 3.0 Spill-Proof Milk Bags make on the go pumping hassle-free. Patented, no-spill technology lets you pump directly into self-sealing storage bags. Attach the bag inside the pump then toss it in your fridge or freezer when you're finished.
All-in-one disposable milk collection and storage bag
Offer truly spill-proof mobility - pump in any position (even lying down or doing yoga)
Unique 1-way valve so milk goes in and doesn't come out
Each bag holds 4 oz
Exclusively designed to work with the Willow Wearable Breast Pump Generations 1, 2, and 3.0