This 12-pack of 2.7-ounce Medela breast milk storage containers includes leakproof lids and easy-to-read measurement markings, allowing you to conveniently collect, store, freeze, and feed small amounts of breast milk. Pair these containers with the 3-pack of Medela slow flow spare nipples, made of odorless, tasteless silicone, to feed your baby directly from the storage bottles. The storage bottles feature curved bottoms to minimize wasted milk, along with magnified ounce and milliliter indicators so you can accurately track baby's milk intake. The screw-on lids provide a leakproof seal for spill-free portability. As Medela's #1 physician-recommended breastmilk storage product, these BPA-free containers are designed to preserve milk's nutritional properties during freezer or refrigerator storage. The spare silicone nipples come in slow and medium flow options to match your baby's feeding stage. Designed to fit all Medela bottles, these nipples are dishwasher-safe and can be sanitized for easy cleaning. With compatible storage containers and nipples, this bundle offers a complete milk storage and feeding solution.