Lansinoh’s Breastmilk Storage Bags are ideal for storing expressed breastmilk in the fridge or freezer, and now come with a hygienic tamper-evident and secure tear-away top, with a double seal to prevent spills or leaks. The bags also have double-sealed side seams for extra strength, and are pre-sterilised, they’re also BPA/BPS free so no harmful substances can contaminate the stored breastmilk. he double zipper provides a secure seal and the easy pour design minimises the chances of spillages – there is even a convenient tab to note the date of expression and a ‘use by’ date.