Granicium® is a proprietary development of the pottery. The starting material is real granite, which is crushed into rock flour in a mineral mill. Together with water and effective microorganisms, this flour is transformed into a malleable mass that is very similar in structure to ceramic clay in a process known as mastication that lasts several days. When wet, however, this mass is sensitive and can only be further processed with great care and skill. The drying process alone takes two weeks, which must be waited for before a shaped bird bath can be fired at very high temperatures in a gas kiln. An effort that pays off, because Granicium® is extremely hard and even frost-resistant.

During a prolonged period of cold weather in winter and snowfall, it can be difficult for wild birds living in our country to get drinking water or a place to bathe to clean their feathers. Puddles, streams and lakes are then usually frozen. It is therefore all the more important to set up a bird bath in your own garden in addition to the bird feeder. This watering trough lasts through all seasons and can safely stand outside, especially in winter, because it is made of frost-resistant material. Therefore, even permanent sub-zero temperatures and ice formation can do little harm to it. Insects can also settle down to drink on the central island that rises slightly from the bowl.