Includes 25 storage cups that hold 6 oz. each, 28 storage lids and 6 connectors so that baby can drink milk directly from the storage container with an Avent nipple. Never had issues with leaks while on the go. Having an abundance of storage containers made all the difference feeding my babies and I hope these can be of help to you too! Containers snap together for easy stacking in the fridge or for storage in a cabinet/drawer. See photos for details. New to PoshMark? Use my code: JANDKONLINE when signing up for $10 off on any purchase.