Looking for a slush puppy maker from the 80s.?

kids slush maker image

Sarai

I'm looking for this cool slush-puppy-making cup thing we used to have when we were kids. It was like a mug with two sections, it had an insulated inner bit you stuck in the freezer until it was frozen solid. Then you'd put it back in the outside, pour in whatever drink you wanted and stir until it turned into icy slush.

Does anyone remember these and/or know what they're called so I can hunt for one on ebay?

Answer
These are called slush mugs, they look like what you are talking about.