Originally Posted by
It'sHip2B^2
You can bring any foods or drink for a baby/toddler. I recommend two days worth in case you have a delay. When you go through security just declare your stuff and they will tell you what they want done with it. Milk, breast milk, food pouches, water, formula, juices, etc are allowed. You are also not subject to size restrictions.
The OP is flying from Philadelphia to San Diego. Taking two days worth of formula and baby supplies for the flight would be a bit excessive.