We don't pack water or other beverages because it's just easier for us to buy them once we get to Florida. However, we've packed all sorts of food/snacks in our check baggage and have never had a problem. My mom has a bunch of food allergies so she always packs a bunch of snacks and things that she can eat. On our way home, we will even pack up leftovers that we didn't get a chance to finish! Just make sure foods are packed up carefully so that they do not make a mess. Even if we reach our destination and find that the TSA has left a note saying they searched our luggage, none of the food has ever gone missing.