Necklace seems OK to me - the Alcor Emergency ID Tags includes a necklace and bracelet.

I thought Eliezer was taking your comment a bit seriously - but on rereading his comment, I now think it makes sense to ask for your objections to be split up.

There's a problem, though - his "don't tell people about the necklace" sounds as though it would help to defeat its ostensible purpose. It is intended to send a message to those close to the near-death-experience. It is tricky to send that kind of message to one group, while not sending it to everyone else as well.