Chapütschin and Gion planters are designed by Rezo Design to remind different situations in real life plants growing. They are great examples of how plants could grow through cracks in rocks. Although they are made of wood instead of stone. That makes them perfect not only for patio decorating but also to use as indoor planters. There is no info about on the designers website is there some sub-irrigation system inside these planters but their size tell that there is. In case you like these Rezo Design works you might order them from Pour les Alpes, they will be available there very soon.