Cooler yes, dry ice - I don't know?
You can get dry ice from some grocery stores, or bar supply stores.
Get a can of cranberry sauce, chill it down, cut it up into little cubes. Put the dry ice into the cooler and cover with a towel, and arrange the cran cubes around the other side of the cooler. Close the lid and wrap it (all around) with good plastic wrap and chill the whole thing (prolly best if you have spare fridge). You want to keep everything as cold as you can without freezing the fruit. As the CO2 sublimates, it will be absorbed into the water molecules in the fruit, carbonating it. Let it go overnight (12 hours or so) and cut the plastic off; beware when you open the lid, because it will be a high-CO2 environment, and inhaling that directly can actually feel like you're burning your nose.... which is the sensation you are actually looking to created with the carbonated fruit (those same receptors trigger all your other senses to respond, so the fruit will smell and taste more of itself than the regular non-carbonated version).
So there you go. Pop Rocks in canned cranberry form.
(You can do this with pretty much any fruit, but it work best in things that are high in sugar.)
The larger your cooler, the more dry ice you'll need as the CO2 absorption seems to be more a function of container volume than amount of food. So if you have a stand mixer, I'd recommend getting around 1 kg of dry ice, using half of it to make the fizzy fruit and the other half to make soft serve ice cream to order.
I never see them at Camp Horne Road Giant Eagle. Am I missing them?
