Biodegradable Pens of Laghi Suviana e Brasimone Park
Green Pen Click is made of Mater-Bi, a material based on corn starch:
it can be recycled more than once, with no variations in properties; it
burns without leaving metal residues and without forming harmful
substances; it is entirely biodegradable and after composting it
becomes a fertilizer used to generate agricultural products.
Notes: Blue ink.