• Pre-sterilized milk pouches: Each BPA-free breast milk pouch holds up to 6 fl. oz of breast milk. Complete with leak-proof caps and suitable for storage in the fridge or freezer • Universal: These pouches simply click into your Tommee Tippee breast pump, or other pump of your choice using an adaptor (sold separately) so you can express without losing a single drop • Feed directly from the pouch: When feeding time comes around, simply pop your pouch with your warmed milk into the pouch holder (sold separately) and attach a nipple of your choice • Name, date & volume panel for easy labelling: You can write directly onto each bag your name, date and volume, which in those early days of breastfeeding means one less thing to remember • Baby-safe: The Tommee Tippee breast milk storage bags are BPA-free for total reassurance