The gift shop souvenir that actually tastes good. Real vanilla ice cream is frozen, then freeze dried in a vacuum so the water leaves without the cream ever melting, and what is left is a light, crisp block that dissolves on your tongue back into something startlingly close to ice cream. Here it sits between two chocolate wafers, so you get the whole sandwich in a form that needs no freezer, no cooler and no hurry. Tear the pouch and eat. It keeps for three years on a shelf, which makes it the rare treat you can throw in a backpack in July, forget about, and find again in perfect condition at the top of a trail. Kids who have never seen one are reliably amazed. Adults who remember it from a museum trip are worse.