Tritium pendants are both functional markers and personal symbols. Each piece contains a self-illuminating tritium vial—an isotope of hydrogen that naturally emits electrons, causing the internal phosphor coating to glow without batteries, charging, or external light. This steady illumination lasts for more than a decade, and its finite lifespan serves as a purposeful memento mori: a reminder that time, like the light itself, is limited and worth honoring. Every pendant is machined from titanium, brass, or stainless steel for a refined aesthetic. Each pendant functions as a luminous marker while also standing as an enduring keepsake—a quiet reminder to make every day count. Tritium vials are glass as CAN break if mishandled, buyer assumes all responsibilities for the purchase and use of this item and no warranty is offered or implied.