![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)
I got a keychain that uses the radioactive decay of Tritium (the radioactive isotope of hydrogen) to emit light. : r/mildlyinteresting
![noticed some wasted space in my keyport. attached a tritium vial for better visibility at night : r/EDC noticed some wasted space in my keyport. attached a tritium vial for better visibility at night : r/EDC](https://i.redd.it/ej4tv5s1nww31.jpg)
noticed some wasted space in my keyport. attached a tritium vial for better visibility at night : r/EDC
![Metal keychain gadget that opens and exposes smooth „rod“ on inside. Tip of rod is exposed. Gripping support to open. : r/whatisthisthing Metal keychain gadget that opens and exposes smooth „rod“ on inside. Tip of rod is exposed. Gripping support to open. : r/whatisthisthing](https://i.redd.it/metal-keychain-gadget-that-opens-and-exposes-smooth-rod-on-v0-jx4syetdo65a1.jpg?width=2631&format=pjpg&auto=webp&s=73e3006a1e7be3513567a16d738882d31e0ca4e6)
Metal keychain gadget that opens and exposes smooth „rod“ on inside. Tip of rod is exposed. Gripping support to open. : r/whatisthisthing
![I showed the U.V. tritium pendant I made, but now I finished a second in blue. : r/mildlyinteresting I showed the U.V. tritium pendant I made, but now I finished a second in blue. : r/mildlyinteresting](https://i.redd.it/htenz7sr6ik31.jpg)
I showed the U.V. tritium pendant I made, but now I finished a second in blue. : r/mildlyinteresting
![I bought a keychain containing a sample of tritium gas. A radioactive isotope of hydrogen that glows : r/pics I bought a keychain containing a sample of tritium gas. A radioactive isotope of hydrogen that glows : r/pics](https://i.redd.it/i-bought-a-keychain-containing-a-sample-of-tritium-gas-a-v0-1rswjlzjt9wb1.jpg?width=1875&format=pjpg&auto=webp&s=91aa2b0fee9fb841856aa189aa3b51a91fc5c885)
I bought a keychain containing a sample of tritium gas. A radioactive isotope of hydrogen that glows : r/pics
![On what to put this tiny thing? What would you put it on? First thing I could think of is on a light... (It's a Trigalight tritium glow fob) : r/EDC On what to put this tiny thing? What would you put it on? First thing I could think of is on a light... (It's a Trigalight tritium glow fob) : r/EDC](https://i.redd.it/av6h1tkwwupb1.jpg)