It's kind of like a slushy. What's it called?
I found a gadget in a magazine that is shaped like a T. The top part of the T is the handle and the bottom part has a little slit in it almost to the top part of the T. You put the almost empty tube into the slit and use the top part as a handle to roll the bottom up. You'd be surprised how much you can get out of a tube you almost threw away! You can find the in any of the senior products type magazines and they're pretty cheap.
If we are thinking of the same product, it isn't actually a candy. It is called a Kool pop, and is closer to the pop sicle family of frozen treats.
I think it's called Flavor-Ice, but there may be different brands.