...So here's how I modified the key to my '92 Honda Civic to moonlight as a bottle opener.
TOOLS & MATERIALS:
- Key (car keys probably work better than house keys - so opening a bottle will be a reminder not to drink if you're driving!)
- Bottle with cap still on
- Dremel tool with cutting wheel and high-speed cutter drill bit
- Safety glasses (protection from the metal dust)
Step 1: Figure Out the Geometry of Your Key As It Relates to a Bottle
I'm sure there are dozens of different key geometries that would work just as well.
Step 2: Cut Away Material With a Dremel Tool (get Under the Cap's Lip)
I focused first on getting the key under the lip of the bottle cap. I cut a pointed tooth (sharp corners rounded off) that allowed enough of the key head to wrap around to the top of the bottle cap and provide leverage (the next step).
Step 3: Refine the Shape (get the Right Leverage)
Step 4: Drill a Hole for Your Keyring (if Necessary)
Also, think about what side you want the keys to hang from (while you're opening a bottle and while you're using the key). I didn't want the keys flopping all over the top of the bottle, so I drilled the hole on the same side as the tooth. The keys hang nicely along the side of the bottle.