I'm glad to see work being done on packaging alternatives, especially biodegradable/compostable solutions. However I have one issue with using mushrooms: these life forms are so remarkable and so valuable for nutritional and medicinal purposes that the time and energy spent cultivating them just for packaging material is a terrific waste of resources in itself. Search "medicinal mushrooms" or "fantastic fungi" to gain an understanding of the extraordinary nutritive potency and medicinal potential of mycelial crops. Perhaps a symbiosis between mushroom growers and processers could be worked out, whereby nutrients and medicines are first extracted and concentrated, and the 'drosses' or fibrous remains are then processed into packing and construction materials. In other words, if you're taking the trouble to grow mushrooms, maximize your resource and production capabilities. The same sort of thing could be done with cannabis cultivars, could it not? I'm looking toward a future of zero waste, of all materials and energy generation.