You've found them throughout the Wastelands, now get one to carry of your own!

These Nuka-Cola keychains are made of resin with Glow-in-the-Dark powder rated to last least 10 times longer than other glow powders!

https://www.etsy.com/listing/285914917/nuka-cola-quantum-keychain?ref=listing-shop-header-0

More items available at http://theatomicsoul.storenvy.com