Skunklock

Millions of bikes are stolen every year - and there is hardly anything you can do about it. Even the toughest locks can be open - especially since strong battery driven angle grinders are available.

But here comes the lock that fight back: Skunklock:

"SKUNKLOCK is a hardened medium-carbon steel U-Lock that's as difficult to compromise as the strongest U-Locks, AND comes with a surprise: it's pressurized inside with a noxious chemical deterrent that slams the would-be thief with noxious chemicals. The chemicals are so disgusting they induce vomit in the majority of cases, and elicit an instinctive response to run away immediately."

I bet you agree that the thieve who was trying to steal your bike deserves this...