These are the first reusable 100% platinum silicone breast milk storage bags! Zip Top containers are completely free of BPA, lead, PVC, and phthalates. So, instead of using disposable breast milk storage bags (and heating your liquid gold in plastic), you can now use these better and safer silicone bags! With this set, you can save your milk and save the planet. We love how these Zip Top breast milk bags stand up, stay open, and zip shut. Their pour corners and sturdy one-piece design have no glue or seams and they won’t rip. They’re also freezer and dishwasher-safe and easy to sterilize. You can even write on them!