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In liquid mixtures, this usually means forming the smallest possible interface between two substances. But the urn shape has more surface area, not less. Tech. Entertainment.

Specifically, the liquid you’re using must have at least 4% sugar content. If it doesn’t, it will become too icy, and the machine will have trouble scraping the frozen mixture out of the ...

He made his mixture, shook it up—"and, in a complete surprise, the mixture formed this beautiful, pristine urn-shape." No matter how many times or how hard he shook, the urn shape always returned.

Later liquid mixtures solved that issue, but even then, the system was complicated, which made it expensive – one of a business's least favorite things. How hydropneumatic suspension works.

These sorts of liquid mixtures are known as "shear-thinning thixotropic non-Newtonian fluids" because they don't appear to follow the normal rules of liquids and solids.