CENTO3 started with an unpublished 2001 design collaboration for writing instruments by Achille Castiglioni and his friend architect Gianfranco Cavaglià. The trilobate shape proved too complex for production techniques of the time and was forgotten. After twenty years hidden away, Fondazione Achille Castiglioni, architect Gianfranco Cavaglià and Italian design firm EGO.M have found a way to bring Castiglioni’s last design into reality. Each instrument is 3D printed with an extremely durable, sustainable and feather-light Graphene/PLA filament. The long additive process creates a subtle non-slip texture, and each piece a unique artifact as each instrument is printed individually. The ergonomic trilobate shape prevents CENTO3 from rolling off the table.