Lansinoh's #1 selling breastmilk storage bags are ideal for storing and freezing precious breastmilk. Lansinoh bags come pre-sterilized and have a patented double Click ‘n’ Secure seal to prevent leakage. With reinforced side seals and a double-sealed gusset, Lansinoh bags are the strongest breastmilk storage bags available. BPA and BPS free. Now, Pump directly into bags 2 ways: Using Lansinoh pump – Attach bag to expression set and pump directly into bag Using most standard size pumps - Attach adaptor to expression set and pump directly into bags. Adaptors sold separately. IMPORTANT! Ensure your Lansinoh Breastmilk Storage Bag has white and purple flowers and a white line above the logo. If your bag does not have this design, it is not compatible with pumping directly into the bag. Fits most Medela, Ameda, and Eveflo pumps Lansinoh Breastmilk Storage bags come in 3 convenient pack sizes: 25 Count Lansinoh Breast Milk Storage Bags, 50 Count Lansinoh Breast milk Storage Bags, and 100 Count Lansinoh Breast milk Storage Bags. Founded by a breastfeeding mom, Lansinoh has been committed to helping moms succeed in breast feeding for over 30 years. Lansinoh is a leader in breast feeding products and accessories, famous for its award-winning cornerstone product, HPA Lanolin, Lansinoh and Lansinoh nursing pads. For more information, please visit Lansinoh.com or connect with Lansinoh on Facebook, Twitter, Instagram, Pinterest and YouTube.