Have you looked at the Esperanto-USA catalog? They have bags, stickers, pens, bumper stickers etc. Look under "sundries" in the catalog

I don't wear much with lapels. You can wear lapel pins on a collared shirt or jacket, though. Or just put a pin on your jacket.

I used to have a flag pin on the lapel of my winter coat and a star pin on the collar of my fall coat. I think I took them off to wash the coats and never replaced them. It didn't much matter, I never met another Esperanto speaker that way, and I was seldom asked about it regardless.

If you simply let it be known that you speak Esperanto, it seems to be a fact that people spread around. I have gotten some teasing for it at previous jobs, on the negative side. On the positive to neutral side, I occasionally get a reaction of "oh my uncle used to do that". Someone randomly came up to me in my synagogue and told me he heard I spoke Esperanto, and I said yes, so apparently someone else at the synagogue told him, though I am not sure why this would be an interesting topic of conversation. That was probably more reaction than I ever got from years of having a flag pin on my coat.

I once was outside of a movie theater and the man in front of me in line had a large green star tatooed on his upper arm ... I was very tempted to ask him if he spoke Esperanto, but given all the biker paraphenalia he was wearing, I figured that it was safer not to

Amike,
Paul

kaŝperanto:I presently don't have any real way of announcing myself, unless carrying around a copy of "La Hobito, aux tien kaj reen" counts as an indicator.

Actually, having a book in a certain language is an excellent way of attracting speakers of that language.

I used to make it a point to bring a foreign-language book with me on planes in an attempt to discourage my seat-mates from striking up a conversation with me. Unfortunately, on numerous occasions people would either (a) view that as an invitation to try out their (always non-native) knowledge of said foreign language or (b) ask me what language that was and how I knew that language. Now I just wear headphones.

Never had that happen with Esperanto though ... I think most people assume it's Spanish or something.

Amike,
Paul

pdenisowski:I once was outside of a movie theater and the man in front of me in line had a large green star tatooed on his upper arm ... I was very tempted to ask him if he spoke Esperanto, but given all the biker paraphenalia he was wearing, I figured that it was safer not to

Amike,
Paul

That's funny. In my experience most bikers are actually very nice people, so I wouldn't be surprised if he was an Esperantist. The more biker they look the nicer they seem to be (if/when you get to know them well).

Where I used to intern there was a machinist who was an all-out biker. He had several bikes (one was a 'boss hoss' with a V8 Corvette engine), many pistols and long guns (including a Desert Eagle .50), he had a full beard and biker wardrobe, and he was also a Vietnam veteran. But he's one of the nicest guys I've met.
I believe he had perfect attendance more than any other employee at the company, and when the snack truck was in he always made sure to request our favorite snacks for us.