they do have coke zero, but might only be at the stations at ulu cafe and ama ama.
you can also get hot coacoa (have to go to ulu cafe cashier and ask with your mug)
much cheaper to buy soda for your room...but the mugs and 3 drink stations are convenient...and the mugs do make for nice souvenirs.
Powerade, and I think there was Icedtea & lemonadeIs there anything besides soda at the refillable stations? I would love to see sparkling flavored water like I can get at the DVC Member Lounge in Epcot.