KUPILKA products are made from a unique and very light weigh natural fiber composite material. They consist of 50 % recycled pine wood fiber and 50 % polypropylene. The materials - which also have perfect resonance and are used in musical instruments - was developed by the European Forest Institution. A unique attribute of KUPILKA is that at the end of its life-span, the product can be safely disposed by burning. The material compound, which has a very unique look, provides a structure that is solid, humidity resistant and hygienic as well as being dishwasher safe.