The BTTR Mushroom Kit yields up to1 Lb in as little as 10 Days. This mushroom kit is great for the whole family. The Mushroom Kit makes a perfect green gift for that special someone. The BTTR Mushroom Kit uses100% recycled coffee grounds as a growing medium for the mushrooms. The recycled coffee grounds make this mushroom kit a safe and sustainable way to grow gourmet mushrooms. Please check out the mushroom kit recipes on this website under the Recipes Tab. We hope you enjoy your mushroom kit. Happy Harvesting!