Along with the classic ballpoint pen, the various writing systems are all based on a specially developed and innovative ink flow system. The cartridges can be used and retrofitted. This guarantees long-lasting writing joy and appeal. The combination of writing systems and recycled PET material makes the uma RECYCLED PET PEN series a world first. The first sustainable writing series made from rPET material, which is produced completely climate-neutral, gives companies looking to communicate attractively sustainable and written innovation. The sustainable uma recycled PET PEN series guarantees promotional communication and an enjoyable writing experience of the highest quality.