Spill-Proof Milk Bags
Spill-Proof Milk Bags
Spill-Proof Milk Bags
Spill-Proof Milk Bags
Spill-Proof Milk Bags

Spill-Proof Milk Bags

All-In-One Milk Collection and Storage (48-Pack)

Meet the only disposable, spill-proof collection and storage Milk Bag. Our patented, no-spill technology lets you pump directly into self-sealing storage bags.

  • Essential to pumping with Willow (24 bags included in Pump Kit)
  • Offer truly spill-proof mobility - pump in any position (even lying down or doing yoga)
  • Pump on the go and toss into your purse or cooler bag - totally hygienic, no need to seal or transfer
  • Unique one-way valve so milk goes in and doesn’t come out
  • Pump and store milk in the same collection and storage bag
  • Fridge and freezer safe
  • Holds up to 4 oz.
  • BPA free
  • Recyclable

$23.99

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Sizing Guide

Size matters! Here's how to find your Willow size

Download Printable Guide

Coin Method

  1. First, stimulate your nipple until it perks up (don't skip this step!)

  2. Hold up a dime, nickel and quarter to compare each coin against the diameter of the base of both of your nipples, not the areola (see diagram below)

  3. Willow Size Guide

    Find your Fit

    If your nipple is: Your size is:
    Much smaller than a dime See Printable Sizing Guide
    Equal to or smaller than a dime 21mm
    (Milk Container only)
    Larger than a dime but smaller than a nickel 24mm
    Equal to or larger than a nickel but smaller than a quarter 27mm
    Equal to or larger than a quarter 30mm
    (Not Offered Yet)
    Note: Sizing is the same for Milk Container and Flanges