I'm curious about how she could pee that often in such a short period of time. Are you sure she didn't dump water from the sink or tub into the potty? A few drops, I could understand. But filling the potty like that? Something seems off.
If she filled the potty with water from the sink, then it seems she's demonstrating that it's more about the prizes than the learning-to-use-the-potty.
So now might be time to switch from "getting a toy" to the ultimate goal of potty-training, which is staying dry, keeping one's clothes clean, getting to the point where pre-school might be an option, etc.
Try switching the prizes now from "every time you use the potty" to a grander goal, like staying dry for an entire day, or staying dry for 2 days, then 3, etc. You can tell her that big girls don't get a prize every time, but now that she can use the potty she can go to pre-school, or not have to worry about diapers, etc.