The first thing that came to my mind was one of those refill bottles for your printer cartridge? I don't know though.

Put it in your mouth. It's the only way to be sure.

But it's BLACK, not that tan color. I need someone who is familiar with things that are BLAC-- oh, right, thanks CO.

[img]http://www.americanethnography.com/img/heroin-bottle.jpg[/img]

Looks like you've got a Radio Controlled Car racing enthusiast that frequents your alley:

[img]http://www.redrc.net/wp-content/uploads/2009/12/TeamEpicBLoil-400x331.jpg[/img]

We have a fence that leads to an alley. That's how I get the motorcycle out.

The alley is... if you've ever played one of my games in the past, you know the type of alley. If you end up playing Cyberganked, I assure you you'll see the alley.

On the fence this morning was this vial. Dropper. Plastic thingie. It was placed precariously where I was sure to see it.

[img]http://i.imgur.com/4QwRipD.jpg[/img]

No idea what it is. It doesn't say on the bottle. I've had guesses of ball bearing oil, graphite, motor oil and kill yourself. Ha ha just kidding, nobody's come out and said it.

I think that if people are leaving stuff for others on their fence (and everyone clearly knows I own a motorcycle) that it's creepy as fuck.