A novelty ring that became a sensation in the 1970s. It contains a thermochromic element, often a liquid crystal, that changes color in response to temperature fluctuations, which were popularly believed to reflect the wearer's mood. The rings were known to sometimes turn the wearer's skin green due to the base metal.
Remember mood rings? No. You remember those? Um I think that may have been They had them when I was in high school. They had mood rings.
""The speaker asks Joe Rogan if he remembers mood rings, leading to a discussion about their popularity in the 70s and 80s and their supposed ability to indicate emotions based on body temperature."