Orlando Informer has a page on the refillable programs; I don't know that I'm supposed to link there. It's in their trip planning area, under 'making the most of' It answers about 10 million questions about the refillable programs.
The $8.99 refillable cup is 99c refills forever, even though it only says one day.
The CocaCola Freestyle cups are $11.99 and refills are free that day only. For $5.99 you can add days. It apparently has an rfid chip in it that they activate when you pay each day.
The popcorn bucket is $5.99 and has forever refills at $1.29.