The most official water costs $120k a gallon

A Hacker News thread debated whether Celsius, Fahrenheit, or Kelvin is the most intuitive temperature scale.

Commenters compared the strengths and weaknesses of each system in terms of everyday human intuition.

The discussion also highlighted the extremely high cost of isotopically pure water, including deuterium water and tritium water.

These specialty materials are expensive because they are hard to produce and have limited lab use, though they are not unusual in niche supply markets.