Rubber Duck
Modern rubber ducks, typically constructed from polyvinyl chloride or similar thermoplastics, demonstrate remarkable resilience to environmental stressors. Specimens have survived decades of bathtime deployment, with collectors displaying functional units from the 1940s and 1950s. The material resists water degradation by design.
The famous Friendly Floatees incident of 1992, wherein twenty-eight thousand rubber ducks escaped a shipping container into the Pacific, provided inadvertent durability testing. These ducks have been recovered on coastlines worldwide for over thirty years, their structural integrity largely preserved despite oceanic conditions.
The Joker
As a fictional construct, The Joker exists beyond conventional physical durability metrics. The character has survived countless apparent deaths, reboots, reimaginings, and timeline alterations across eight decades of continuous publication. This conceptual immortality represents a form of narrative permanence that physical objects cannot achieve.
However, individual Joker iterations possess finite cultural half-lives. The Cesar Romero interpretation of the 1960s has largely faded from active cultural memory, replaced by subsequent versions. The character endures; specific manifestations decay.