Bring Your Own Water Bottle
The best Disney budget hack is that you can score free water at any quick service location . . . but those cups add up. Instead, bring your own water bottle and fill it up for free at one of several water bottle filling stations across the parks. At my bachelorette party at Disney, I gave reusable tumblers as gifts. These were great to use by the pool and limited how many plastic cups and straws we used from the bar.