In Spain a company is using them to make a kit for having your own mushrooms at home and then reuse it (again) as compost : http://www.resetea.es/#!el-kit/cgmn

In Spain a company is using them to make a kit for having your own mushrooms at home and then reuse it (again) as compost : http://www.resetea.es/#!el-kit/cgmn http://www.resetea.es/#!el-kit/cgmn (sorry only in spanish and the google translate wasn't working)