Hello, Emilie!
Thanks so much for sending your question to us at Disney Parks Moms Panel!
What an exciting trip you have in store for you and your little one!
You will be able to find a variety of items for your baby throughout the parks and Walt Disney World Resort hotels. Take a look at this menu, for example, from a great Quick-serve restaurant at Magic Kingdom,
Comic Ray's Starlight Cafe. There, you'll see that they currently offer low-fat milk. Also at Magic Kingdom,
Sleepy Hollow and
Columbia Harbour House also offer milk, but they are not necessarily the whole milk you'd like to purchase.
To be sure that you have what you need when you need it, I would bring those shelf-stable items with you to the parks. This will save you time looking for that specific item that may be available, but not as convenient to find than if you brought it with you.
In addition, be sure to check out the
Baby Care Centers, which are located in each of the four theme parks. While they may not carry the exact item you need, you will find so many conveniences for families with little ones in tow. You'll be amazed at all of the features there that are designed just for your family's particular needs. (Truly, I fell in love with
Walt Disney World on my first visit partially because of everything provided in those centers!)
As you plan your magical visit, Emilie, be sure to send us more questions. We love to help!