Most fast food places here have the soda dispenser in the dining room. When you order at the counter, they just hand you a cup and you fill (and refill) it yourself. It didn't use to be that way here either, but the last 10 years or so it's become the norm. Kind of interesting that it isn't normal in England.
Actually when we're eating at the Resort food court on the DPP, we fill up the mugs and grabs bottles of juice and water! No point in taking the paper cup, when we already paid for the refillable mugs.