The "Polar" Milk Cooler
- 1930s
This work is licensed under a Creative Commons Attribution 4.0 International License.
A terracotta vessel designed to go over a milk bottle. The terracotta is to be soaked with water, and so will keep its interior space cool through evaporation.
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Cite as
Science History Institute. The "Polar" Milk Cooler. Photograph, 2023. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/16iwyux.
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