Hi! WDW newbie checking in! Planning a trip to WDW (AoA) in April - 2 days before our Disney cruise, 2 days after. Will I need to buy 2 sets of refillable mugs or will I be able to use the same ones before and after the cruise? I wouldn't mind buying a second set if I was returning in a few months but I'm hoping I wouldn't have to rebuy them a few days later otherwise it probably wouldn't be worth the money right? Thanks for your input!