Here is a goal: How can you make cheap I.D. tags for trees or plants outdoors?

Which way makes more sense to accomplish this goal?

Pick from:
*Cut them out of an old aluminum TV dinner or foil pie pan. Place each tag on a soft surface and inscribe it using a ball point pen. The imprint will last indefinitely. Attach them to your plantings or anything else that needs weatherproof, permanent I.D.;
*Cut them out of an old cardboard TV dinner box. Place each tag on a soft surface and inscribe it using a ball point pen. The imprint will last indefinitely. Attach them to your plantings or anything else that needs weatherproof, permanent I.D.;
Cut them out of an old aluminum TV dinner or foil pie pan. Place each tag on a soft surface and inscribe it using a ball point pen. The imprint will last indefinitely. Attach them to your plantings or anything else that needs weatherproof, permanent I.D.