Today I learned that it is illegal to sell tritium in the us but it is not illegal to buy it in the us…so here is a website selling tritium trinkets that come from taiwan!
They are like glow sticks that last for 10 years, it is perfectly safe unless maybe you were drinking liquid tritium for a few weeks.
I’ve have one on my keychain for years, it’s great. Not visible during the day, but just bright enough at night to make them easy to spot.