A pot-in-pot refrigerator, clay pot cooler or zeer pot (Arabic: زﯾﺮ​​ ) is an evaporative cooling refrigeration device which does not use electricity. It uses a porous outer earthenware pot, lined with wet sand, contains an inner pot (which can be glazed to prevent penetration by the liquid) within which the food is placed – the evaporation of the outer liquid draws heat from the inner pot. The device can be used to cool any substance. This simple technology requires only a flow of relatively dry air and a source​ ​ of​ ​ water. 
Workshop​ ​objectives
To design and construct a Zeer Pot relating the geometry and texture of the print to the climatic performance.
This workshop will be the occasion to learn how to use a Robot for Additive Manufacturing, How to prepare the soil based material, how to deal with the geometrical limitation of 3d Printing as well as engage​ ​with​ ​performance​ ​driven​ ​design. Givens In order to create a comparable range of design between the students and to fit the design within the quantity of earth of a single tank, you will have to frame your design on a initial primitive surface which​ ​you​ ​will​ ​find​ ​in​ ​the​ ​given​ ​rhino​ ​file.
The​ ​inner​ ​pot​ ​will​ ​be​ ​given​ ​to​ ​you​ ​upon​ ​starting​ ​the​ ​workshop.
The​ ​mission​ ​of​ ​the​ ​workshop​ ​consists​ ​of​ ​design​ ​and​ ​produce​ ​the​ ​outer​ ​pot.
Students will have to base your design around a freedom to model +/-15 mm away from the primitive surface.

Ya-Chieh Chang, Zeer pot, OTF 2017-18