Like a "swamp cooler". The problem is the melting happens in transit. By the time it gets to you there's very little ice and it is thus very expensive. Too expe

Like a "swamp cooler". The problem is the melting happens in transit. By the time it gets to you there's very little ice and it is thus very expensive. Too expensive to leave by your bed side at night next to a fan to cool you... unless you were wealthy.