I think you are referring to 'quiescently frozen confections'
"Commercial vendors of flavored ice use stabilizing ingredients that keep the syrup, flavoring and other ingredients from separating from the ice as it forms. Instead, these other ingredients become a sort of semifrozen lubricant between the ice crystals, giving Popsicles their slushy consistency"
I found it here:
http://home.howstuffworks.com/question499.htm
BTW, I think the Welch's grape juice bars are the best. Popsicle brand Banana popsicles are a close second though.