The Medela Ice Pack for Breastmilk Storage is a convenient spare ice pack for moms on-the-go. The spare ice pack for use in the Pump In Style Breast Pump cooler bag. Cooling safely stores fresh breastmilk for up to 12 hours when the ice pack is frozen solid and used in Medela cooler carriers. Contoured pack fits around bottles perfectly. Legal Statements: This and all items from Medela are excluded from all promotions and discounts except where otherwise noted on product detail pages.