Not quite the one I am looking for, but very similar. My kids used to take one like this in their lunch. It kept their lunch cold and was just right for eating at lunch. Of course I put it in a plastic sealed container.
my latest craving...frozen fruit slush. Except I only use one cup of sugar, 1 can each lemonade/orange juice concentrate, and for fruit I like crushed pineapple, mandarin oranges, chopped canned peaches, and strawberries.