Locks that work

I can't really recommend sticking your helmet in a lock like this - all it takes is for someone to knock your bike and your helmet's in pieces.

In other news, I have a new shiny red helmet.

I can see that the helmet is covered in dents and dimples. You realise that foam bike helmets are very fragile things? Even if it is in one piece, each time the lock gave it a little squeeze or whack the helmets structure/protective capacity was changing.

Most helmets are designed for a single impact.