![Isotope Triode Fob - Tritium Vial Housing Keychain - 3mm x 23mm or 3mm by 11mm - Camping Accessories - Gifts for Men Isotope Triode Fob - Tritium Vial Housing Keychain - 3mm x 23mm or 3mm by 11mm - Camping Accessories - Gifts for Men](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/71WwQ39urRL._AC_UY350_.jpg)
Isotope Triode Fob - Tritium Vial Housing Keychain - 3mm x 23mm or 3mm by 11mm - Camping Accessories - Gifts for Men
![Amazon.com: TEC Accessories Isotope PRE (Picatinny Rail Edition) Glow in The Dark Keychain, Titanium Housing for 2 Glass Tritium Vial (Not Included) - Tritium Keychain Fob, Edc Key Accessories, Cool Keychain : Automotive Amazon.com: TEC Accessories Isotope PRE (Picatinny Rail Edition) Glow in The Dark Keychain, Titanium Housing for 2 Glass Tritium Vial (Not Included) - Tritium Keychain Fob, Edc Key Accessories, Cool Keychain : Automotive](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/612jkoiAnML._AC_UY1000_.jpg)
Amazon.com: TEC Accessories Isotope PRE (Picatinny Rail Edition) Glow in The Dark Keychain, Titanium Housing for 2 Glass Tritium Vial (Not Included) - Tritium Keychain Fob, Edc Key Accessories, Cool Keychain : Automotive
![I got a keychain that uses the radioactive decay of Tritium (the radioactive isotope of hydrogen) to emit light. : r/mildlyinteresting I got a keychain that uses the radioactive decay of Tritium (the radioactive isotope of hydrogen) to emit light. : r/mildlyinteresting](https://i.redd.it/w8aszm9jxzi41.jpg)