Milk Container Inserts

Milk Container Inserts


  • Replaceable inserts for the Willow Milk Container - grab an extra set if your size changes, or if your inserts show signs of wear and tear
  • Snaps into Milk Container
  • BPA free
  • Dishwasher safe
  • Compatible with Willow Generation 2 and 3 only
  • Replace every 3 months

Insert Size

Size Guide

  • 21mm
  • 24mm
  • 27mm


Free Shipping on Orders Over $70
Free Shipping on Orders Over $70

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
    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