Natural feeding no longer means sneaking off to a far distant corner to pump every few hours. Introducing Nuk Simply Natural Freemie Collection Cups, a revolutionary new way to pump on your terms - anywhere, anytime, and around anyone. It is a discreet, hands-free pumping accessory that allows you to pump under your clothes. The two 8oz collection cups can be slipped into your regular bra and attached to any compatible breast pump, so that you can pump while you work, play and tackle the day. Now, natural feeding can feel just a little more natural. Pump with your shirt on - no hanging bottles Easy to use: just place cups inside bra and connect to a pump, pump directly into cups, then pour into storage containers Two 8oz, collection cups fit discreetly in your bra, pump up to 16 oz at once Compatible with all leading double electric breast pumps, including Medela (Pump In Style Advanced, Symphony, Lactina ), Nuk and Hygeia. Not compatible with Medela Freestyle and Swing. Connection kits sold separately for several other brands at freemie.com Milk contacting components made without BPA Color: Clear.