Cucumber Water (cucumber slices in water) became wellness/spa aesthetic symbol (2015-2017) representing self-care and hydration goals. While adding cucumber provided minimal nutritional benefit, it made water more appealing for some, encouraging hydration. Instagram wellness influencers posed with mason jars of cucumber water, making ordinary hydration aspirational. Harmless trend that at least promoted water drinking.
Sources: Wellness Trend Analysis, Hydration Habit Studies