Wedding Ring Alternatives

Can anyone think of alternatives to a wedding ring that make sense for a white American woman?

If I commit for life to someone, I do want to have it visible, but I don't like rings (wearing them AND what goes into getting the materials to us).

I could do ring on a chain, but eh. It still means dealing w/ jewelry and consuming ring materials.

I'm a little afraid of getting a tattoo around my ring finger, even though it seems to be the most logical option.

I can't imagine a hennaed ring would last more than 4 days at a time on something I work with and scrub regularly.

A dot on the forehead doesn't seem right, since they're just...something from someone else's culture, laden w/ meaning I don't even understand.

Ideas?