The Medela Pump In Style Advanced Breastpump, OntheGo Tote is a daily use, double, electric breastpump designed for moms who pump several times a day. All Pump In Style Advanced breastpumps offer portable convenience for quiet and discreet pumping. An adjustable speed/vacuum dial lets you choose the most comfortable setting, and the battery pack lets you pump anywhere at any time. Includes: Messenger bag, cooler carrier, battery pack, 5 oz. breastmilk bottles (4), 4 lids, travel cap, wide base slowflow nipple, 24 mm PersonalFit breastshields (2), 2 valves, 4 membranes, contoured ice pack, instructions and breastfeeding information guide. The Medela Pump In Style Advanced OnTheGo Tote Breastpump features: Daily use double pump electric New bag style with extra storage. Adjustable speed/vacuum dial lets mom choose her most comfortable setting. Removable PVCfree cooler bag with contoured ice pack keeps milk cool for up to 12 hours. Battery pack lets mom pump anywhere, anytime. (Optional 9V vehicle lighter adapter available). More milk in less time with 2Phase Expression technology when pumping at Maximum Comfort Vacuum. Check out our full line of Medela Breast Pumps . This product has earned the What To Expect Moms LoveIt Award and was selected as the bestofthebest by moms visiting WhatToExpect.com.