Cans and calligraphy: this sounds really like an odd combination. But if you search online for cola pen everything becomes clear and you discover a collection of tools which buffs and experts of this ancient art, currently being rediscovered, use for their works.      Butterfly Wing or large nibs, cola pens are often created by artists themselves, unique pieces made “to measure” for the results that they intend to achieve. On the web, there are plenty of step-by-step tutorials on how to build yourself writing tools from easily found raw material: an empty drink aluminium can.  Malleability and flexibility of cans’ aluminium, coke cans and others, made this material popular with the international community of calligraphers, experts of an art that during our fully d...