The Push-up was a
popsicle-like
treat. It looked like a colored
toilet paper tube filled with
frozen yogurt or
sherbet. From one end protruded a
thin plastic stick. As you ate the frozen yogurt you would use the stick to "push up" some more.
There were orange flavored ones and razzberry flavored ones — no chocolate or vanilla ones. I'm told by WonkoDSane that they are still produced.