This unusual ISO16 series of drinkware was done by Thorben Heuer, during his time as an Industrial Design student at Germany's HAWK (Hochschule für Angewandte Wissenschaft und Kunst, i.e. "University of Applied Sciences and Arts").
The vessels are intended for hot beverages. Heuer selected glazed porcelain as the material, and designed in heat-sink-like fins rather than a typical mug handle. (Note that while the description below says "ceramic," the material is in fact listed on the project page as Limoges porcelain.)
"Design measures can be used to produce heat-insulating ceramic containers that do not require a handle, double-walled casting and no foreign material as a heat-insulating layer. Symbol and preservation are at the center of the design. This design combines hard, geometric and aspiring forms with soft, sensual transitions into an exciting object."
"The ribs create an all-encompassing grip area that always protects the hands from the hot interior."
Heuer, now a minted industrial designer, currently produces 3D-printed designs for an orthopedic and medical supply company.
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