Breastmilk Storage Bags (50 Pack)

These are flat-pack bags that open into a self-standing pouch, with a double zip seal and a built-in label area for the date and volume — the basic feature set anyone freezing a stash of expressed milk needs. Each bag holds up to 180ml (6floz), which comfortably fits a full feed for most newborns without excess dead space in the freezer.

Against Haakaa's own storage bags or a similar own-brand alternative, the practical differences are the seal mechanism and shelf presence: Lansinoh's double zip is easy to feel closed one-handed, and because they're a market leader they're stocked in most UK supermarkets and pharmacies rather than needing an online order when you run low. Some cheaper alternatives use a single seal that's more prone to slow leaks in a chest freezer stood upright.

Best for anyone building a freezer stash for pumping, returning to work, or leaving milk for a partner to give — it's a low-drama, low-risk purchase since almost every parent expressing milk needs some kind of storage bag. The only real limitation is cost per bag versus reusable storage options like breastmilk storage bottles or trays, which work out cheaper if you're expressing regularly over many months rather than occasionally.