The design of this letter holder was inspired by patterns used by nature. In lots of structures material is reduced to minimalize effort while maximising structural strength. These patterns are known as voronoi partitioning.

The engineering of the plastic injection molds were particularly difficult, as the many holes enlarge the moldclosing plane. Furthermore the tool had to be optimized for draft angles in order to reduce the number of the lateral sliders.

The result is an uncompromising beautiful stackable paper holder inspired by the genious hidden mathematical patterns of nature.