Mood picture of children with Stabilo Cappi pens

STABILO Cappi - The fiber-tip pen with a special design and "captive" cap

Consumer goods, Sports, leisure & toys

Children and parents alike are annoyed by the fact that conventional fiber-tip pens dry out and the caps get lost. The STABILO Cappi® provides such a convincing answer to these seemingly inherent problems of all conventional fiber-tip pens that its product concept has already won two awards: the Universal Design Award and the Universal Design Consumer Favorite.

Marketing experts and developers from STABILO, designers and engineers from BUSSE worked together to find new functionalities and design options. In concept phases and interdisciplinary workshops, they developed ideas, visualized concepts and discussed visions of a new type of fibre-tip pen for children aged six and over.

The product concept clearly distinguishes the STABILO Cappi® from the mass of conventional pens in all its key features. Its pencil caps are simply threaded onto a clever ring - making it virtually impossible to lose. The ring can be used to connect all the pens for the school run and hang them on the school bag.

The ergonomic grip zone adapts perfectly to the delicate hands of children who hold it. On the outside, the Cappi® stands out with its unusual tube shape, which is flattened towards the back. A practical benefit: The pens can no longer roll away unintentionally or fall off the table. The best prospects for a long life in children's hands!

The Cappi® underlines the STABILO brand's high standards of quality and innovation.

Although this fiber-tip pen is primarily a product for children, its design and functionality must still appeal to several target groups:

  1. The children and young people who like to use a product or want to own it themselves as soon as they see it at a friend's house, on TV or in a store.
  2. Parents, grandparents and other relatives who like to give the product as a gift because they think it is beautiful and practical.
  3. Teachers who recommend the product out of conviction and, for example, put it on the shopping list for their classes.

These three target groups differ completely in terms of their aesthetic perception, their age and their social background. The functional evaluation of a product also differs depending on the target group - an exciting challenge for everyone involved in product development!

Due to the number of its components, the development history of such a pen is comparable with technically much more diverse products. There are also a number of legal requirements: did you know, for example, that the caps of fiber-tip pens must be perforated? If a child accidentally swallows a cap, the holes ensure that the windpipe is not blocked and the child does not choke - just one of many interesting aspects that were taken into account during development.

The Cappi® from STABILO is another example of how the developers and marketing experts at STABILO, together with the designers and CAD modelers at BUSSE, have succeeded in developing a unique product that has been thought through down to the last detail for a very crowded market.

Stabilo Cappi different colors on ring
Children coloring with Stabilo Cappi pens
Stabilo Cappi different colors in a circle

Our skills

Product design

Design for manufacturability (DFM)


CAD surface design

Value engineering

Your contact person
Felix Timm, General Manager
Felix Timm, General Manager

Our expertise is not only proven by 400+ awards, but also by the enthusiasm of our customers.



"How can tasks and challenges be solved successfully? To do this, you need partners who can correctly grasp and present a task in all its complexity. Setting the right priorities in the future-oriented field of tension [...] and being able to implement them "down to earth" is part of the success DNA at BUSSE Design+Engineering, which we greatly appreciate."



"As an experienced design partner, BUSSE offers everything from a single source. Creative design solutions, prototyping through to small series production and UX design for software. The solution approaches and methods through to implementation always lead to a result that perfectly meets the requirements."

UI/UX Design


„BUSSE is our design game-changer for snow groomers! Their UI/UX team elevates not only icons and layout but the entire user experience to a new level. Clear operation turns every ride into a pleasure. Reliable from development to series production, BUSSE is by our side. Their interface, based on precise product research, simplifies operation. Flexible, forward-thinking, and reliable – BUSSE is our satisfaction guarantee!"



"BUSSE has been the perfect partner for us to develop new and innovative ideas for over fifteen years. BUSSE offers a very high level of professionalism and a first-class understanding of the brand. The team has completely internalized the high standards of our projects and with exceptional creativity, as well as full dedication, has helped us to set new trends. Many of our bestsellers bear BUSSE hallmarks."


Britax Römer

„Child seats are not only visually complex but also technically demanding. Our longstanding partnership with BUSSE turns development into a creative experience. Design sprints and a versatile selection matrix relieve engineers, minimize time-consuming iterations. We appreciate BUSSE for their timely implementations despite limited resources. The collaboration is not only effective but also truly enjoyable!"



"We were particularly impressed by the enthusiasm and technical creativity of the Busse employees. The atmosphere in the project was characterized by professional looseness and great agility. We turned an idea into a finished product in 4 months!"



„We discovered BUSSE Design+Engineering through online research. Contacting them for a functional model led to a contract for a technical redesign. Due to our concept changes, Redesign II was initiated and realized in a prototype, earning a golden award at the 2019 Ambiente trade fair. BUSSE executed the project with precision, on schedule, and with excellent craftsmanship. We look forward to future collaboration with BUSSE."



„The collaboration with the entire project team was always goal-oriented, constructive and pleasant in terms of communication. Mr. Timm and his project team always kept the functional and safety requirements in mind and understood what is also important to us in product development: can-do mentality, agile mindset as well as flexibility and efficiency in all project situations."



"With BUSSE as a sparring partner, we were able to successfully work out a brand-defining design for our latest products that was appropriate for the target group. BUSSE understood our internal company processes very well and was therefore able to deliver optimal results. Deadlines were always met, you can rely on BUSSE. Anytime again!"



"We were positively surprised by the collaboration with BUSSE in that the focus was not solely on the appearance of our product, but rather on the interplay of economical manufacturing solutions, optimized ergonomics and a functional design. The result now impresses with a coherent, unprecedented design concept."