This storage system is amazing. It comes with 6-5 oz bottles, 6-2.5 oz bottles, a storage tray for your fridge to hold the bottles, 6 lids with day and time of day markers on it, 6 regular lids and 25 breastmilk storage bags. Amazing price for what you get! My favourite part is the tracking lids! You can mark what day of the week the milk is from and then mark if it was from am/midday/pm. Amazing product!