Absolute Leakproof: The double-layer and double-zipper design provides extra secure sealing for added leak protection, giving you peace of mind when storing milk for later Protects Breastmilk Nutrients: Ultra-thick double layering and a superior oxygen barrier protect the essential nutrients in breast milk that your baby needs, with 10x better protection compared to our previous bags One-Hand Easy Pour: The unique wide opening and secondary spout make it simple to pour freshly pumped milk into or out of the bag with just one hand, helping to prevent spills and cross-contamination Flat Freezing and Self-Standing: Suitable for long-term and short-term storage, these bags have a flat, stackable design that saves freezer space plus they're self-standing to easily pop in the fridge for a bit Recyclable Material and Made Without BPA: Our bags are made from a single recyclable material and made without BPA, so that both the environment and your breast milk are well cared for Convenient Organisation: These bags are sanitised and easy to store, with a dedicated labelling space to write down the date of filling so you always know how fresh the milk is