Originally Posted by ceridwen
I use the manufacturer's clip for my onguard mini U lock. I've only ever needed one water bottle so far and I managed to fit it in there with one water bottle cage, so it works for me. Faster than dealing with bungies too.
Watch out for that clip. Check the little screws that hold the two pieces of plastic together (not the same as the ones that hold the unit to the frame) from time to time. Mine came undone, after which the whole unit is wasted. I replaced the manufacturer's unit with one from kryptonite. I don't think the kryptonite one is as good as the original, and it took a long time to get to hold tight to the frame. But they seem to be the only people selling lock holders. Having the lock right there ready to go is very handy.