The Dr. Brown's Double Electric Breast Pump, featuring Simplisse technology, is designed to help minimize tugging and pinching and gently elicit milk expression. The Super-Soft BabyFace Flexible Breastcups are squishy soft and puff in and out gently to conform and move with mom's breast while expressing. This mimics baby's tongue and suckling motions to encourage let-down. Milk collection parts are BPA-Free and dishwasher safe for easy cleaning. The Double Electric Breast Pump was created on a simple premise: we believe that moms deserve a more comfortable way to express breastmilk than traditional, non-compression pumps with hard plastic cone-shaped breastcups. So, we went straight to the source for inspiration: moms, babies, and the biological interaction during breastfeeding. Through extensive research and testing, the Dr. Brown's pump featuring Simplisse technology provides a milk expression experience unlike any other that closely and comfortably simulates the way baby elicits milk during breastfeeding. The Dr. Brown's Double Electric Breast Pump includes: Discreet Purse-Like Tote Bag Pump Motor Air Tubing (2) Collection Units (2) 2 Extra Collection Bottles with Storage Caps Insulated Cooler Bag with (2) Ice Gel Packs (store milk for up to 12 hours) Wet Bag for used parts Bonus: Breastmilk Storage Bags (10) and Disposable Breast Pads (4)