In terms of the refill cups, they have the coke freestyle machines (the ones with touch screens with tons of options). There are plenty of non-fizzy drink options in them (our personal favourite was the cherry-limeade). Also, you can use them for coffee, tea, hot chocolate and slushee's!
In terms of room location, have a look at the following resort map:
https://orlandoinformer.com/wp-cont...t-south-courtyard-tower-pool-area-6278-oi.jpg
Closest to the lobby/diner would be the "right most" rooms in the Americana building. In terms of pools there are two (large) separate ones. The one on the left among the tower rooms is a pool and lazy river. The one on the right is among the Courtyard room (which are all family suite rooms). The pool near there has a water slide.
Do you know what kind of room you plan to stay in?