+1. Bungie-cords are dangerous in several ways and not particularly effective.

I now use velcro tape which is very light, easy-to-use, very variable, holds tight, never any hanging loose ends.

Here it is, from this past summer, holding my tent to the rear post rack:



I'm using it below to lash my tent poles to my top tube. At the time it wasn't as available in heavier sizes so was using nylon buckle straps on the rear. I haven't tried it yet for something as large as the bear-canister, but would probably use it for that task in the future.