An edible coffee cup that doubles as a dessert bowl. Sounds straight out of a fairy tale right Like the gingerbread house in Hansel & Gretel Well, these dreams aren&rsquot far from reality anymore. And if you&rsquore travelling with Air New Zealand, it&rsquos as real as it gets. In a bid to reduce plastic waste the airline is rolling out edible vanilla-flavoured coffee cups on a trial basis.