"The Grand Californian hotel sells refillable insulated mugs for $7.95 plus tax. Refills on coffee and soft drinks (milk and juice are NOT included) are free at the hotel's snack bar, Whitewater Snacks, ONLY -- not in the parks or at the other resorts.
It's easy to duck out of Disney's California Adventure through the private entrance into the Grand Californian, and Whitewater Snacks is just around the corner from that entrance. If you are staying for several days and you drink a lot of coffee and/or soft drinks, this can save you quite a bit of money.
You can purchase a refillable mug right out of the minibar in your room if you are a guest in the hotel. However, they will charge you extra minibar fees on it. It's cheaper to wait and buy one at Whitewater Snacks.
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