Hate discarding your spent coffee grounds, or can you get them in bulk from a coffee shop? Our coffee grounds mushroom cultivator is a great, fun way to recycle used coffee grounds, filters and all! With our starter culture, add layers into a lidded container, day after day, with spent coffee grounds and soon you will be cooking up some tasty oyster mushrooms to celebrate your willingness to help the environment! Perfect for break rooms and employee lounges where the mushroom culture can be mixed in periodically into a filter and coffee composting bucket, which will eventually produce edible oyster mushrooms! Also a great gift for any occasion. Detailed directions are included.