I was looking for inexpensive things to engrave at the local department store and came across these cool “Key Tags”. They are a thick paper chip with an aluminum protecting ring around them with a keychain ring already inserted. The Avery 11027 pack has 25 in it for about $3.50.
It turns out these are perfect for engraving on and handing out as trinkets, the paper chips mark easily, but are thick enough that a low laser power setting doesn't instantly cut though them.
I put these together for a short film release party. You can see that film, and others I’ve worked on over at a3o.net.