Garden Grocer is the best way to save money at Disney. If you want to spend 3-4 dollars every few hours just to stay hydrated at the parks ignore my words. Otherwise buy a 24 pack of water from Garden Grocer and put some snacks in your bag to avoid getting taken advantage of by Disney's overpriced snacks.
The ordering process was simple and delivery made right on time. Additionally, the customer service was great and it was very much appreciated that they made follow-up phone calls after the order was placed and after delivery to make sure that everything was satisfactory.