We all know the flux capacitor is the key to time travel, but have you ever actually looked into what it costs to keep a DeLorean running? It’s expensive, and clearly unnecessary to traveling through time now that ThinkGeek makes a version you can keep in your pocket with your keys.

Powered by three button cell batteries instead of stolen plutonium (remember, Mr. Fusion doesn’t exist yet) the keychain features LED lights that really... flux... when turned on using a battery-saving on/off switch on the side. ThinkGeek insists the keychain doesn’t actually facilitate time travel, but for $10 what’s the harm in picking one up, even if you can’t go back in time to the last place you remember having your house keys?