Brass ID Containers
Talk about going low-tech with this gizmo. Just make sure the personal information within does not fall into wrong hands on your travels, as you wouldn’t want someone to stalk you halfway across the world to your home.
Originally designed to hold identification information for pets, these tiny cases (1″ long by 1/4″ to 3/8″ dia.) are equally useful for attaching to backpacks, equipment bags, or anything that might get lost or left behind. Turned from solid brass, each has a plated steel split ring for attachment to a ring, buckle, cord, etc. Just tuck your contact information inside.
You can pick up a half dozen of these puppies for a mere $2.75.
Product Page via Book of Joe