Uritonnoir is a waterless urinal. It is a hybridization of two everyday objects, a urinal and a funnel. This eco-designed device is used either in public places during outdoor events, or in private gardens. L’Uritonnoir is a utensil to fill a volume of straw (carbon) with urine (nitrogen) in order to compost it over 6-12 months and convert it into humus. Once composted, it can be used as fertilizer for your plants and vegetables.