The ‘twiice’ edible cup trial backs up Air New Zealand’s recent switch to plant-based coffee cups on board all aircraft and in lounges. The plant-based cups are made from paper and corn instead of plastic, which enables the cup to break down in a commercial composter. Switching to plant-based coffee cups is expected to prevent around 15 million cups from going to landfill annually. The airline is also encouraging customers to bring their own reusable cups on board aircraft and into its lounges.