Darth Vader
Darth Vader's durability presents a complicated assessment. The organic components have proven spectacularly fragile, requiring full-body life support following an unfortunate lava-related incident on Mustafar. The suit itself, whilst imposing, contains critical vulnerabilities; a well-placed lightning attack can compromise systems entirely.
The character has, admittedly, survived dismemberment, immolation, and decades of breathing through what amounts to an iron lung integrated into formal wear. However, this survival required constant mechanical intervention, regular maintenance, and eventually failed catastrophically when exposed to Force lightning during a moment of filial reconciliation.
Rubber Duck
The Rubber Duck represents an apex of simplified durability. Constructed from vulcanised rubber or modern PVC polymers, the standard bath duck possesses no moving parts to malfunction, no electronics to short-circuit, no respiratory systems to compromise. It floats because physics permits it. It squeaks when compressed. These are its only functions, and it executes them flawlessly.
Specimens have been recovered from landfills decades after manufacture, their structural integrity undiminished. The famous 1992 Pacific container spill released 28,000 bath toys into the ocean; researchers tracked their movements for years as they circled global currents, demonstrating durability under conditions that would destroy most technological apparatus.