emergency scuba kit

For those of you that are using a canister to hold your emergency gear I am wanting to see how you are securing it to yourself and why you use the method you do. I have setup two canisters one for me and one for my dive buddy. They will carry all the standard gear minus a nautilus lifeline...

Scuba emergency kit, unopened, including: 1 mouthpiece, 1 mask strap, 1 rubber fin strap, 1 snorkel keeper, 2 rubber o rings, 2 nylon tie wraps. In addition, I have a separate unopened fin strap, Princeton Tec waterproof flashlight (to 100 meters) with batteries, and unopened Trident mouth...