The Icee Mix it up is gone from Splash Zone. It is now Graeter's. Is there another one somewhere? Or can I go ahead and recycle the tall, swirly cup?

There should still be one in Coney Mall to the left of the Sports Games booth (And the old Flight Commander queue, if you know where that is)

... huh? Splash Zone? Greeters?

You mean a Graeters Ice Cream in Soak City?

Icee is a registered trademark. As such, it is always capitalized here. The owners of the mark are particularly concerned about genericization of their mark.

Graeter's is a registered trademark and a proud sponsor of Kings Island. As such, it is also always capitalized here.

^ I fixed it for them.

The Sheriff twirls 'em, holsters 'em, gets back on his horse, and rides!

I wouldn't be surprised if they were both gone, I hardly ever see anyone at the one over in Coney Mall. Can't speak much for the one in Soak City though.