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

Spill-Proof Milk Bags

48-Pack

  • Our spill-proof pumping option - pump in any position (even lying down or doing yoga)
  • Perfect for pumping-on-the-go - pump and toss in your purse or cooler bag (totally hygienic and no need to transfer)
  • Unique one-way valve so milk goes in and doesn’t come out
  • Pump and store milk in the same 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

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
    (Flange & Milk Container)
    Equal to or larger than a nickel but smaller than a quarter 27mm
    (Flange & Milk Container)
    Equal to or larger than a quarter 30mm
    (Not Offered Yet)

    Note: Sizing is the same for Milk Container and Flanges