There is a registry. It's $20 per set of doubles, $10 for each deco/stage bottle. You can send me the PayPal funds and I'll add your cylinders.
I knew it. I'm glad to pay into the registry if you can round up several to pay into my "Funds for Fundies" account.
there's no standard for this, dude
I put my last name. I wrote it in sharpie on the neck of my doubles and use stickers on stages
You dive with Eric Bana?
...These folk make really good custom ones;
DiveSigns.com: Reflective hard wearing vinyl stickers for all your diving needs..., Be Seen When It Counts
I'll have to take a look at these.