In Chicago, I found a ceramic cup buried in the mud of lake Michigan. How can I find out where it came from?

In Chicago, I found a ceramic cup buried in the mud of lake Michigan. How can I find out where it came from?<br><br>So I am currently in Chicago house sitting for a relative and recently took a walk to the lake. The path was covered in crack due to the winter weather so I found a piece of the path that I figured I could get down to the lake. <br><br>I got to the waters edge and there was this piece of ceramic sitting there. I picked it up and took it home figuring it was probably trash. I cleaned it up and really it looks like it was once a cup. I am almost sure it is ceramic, I don’t think it is plastic.<br><br>Now I am curious where this item came from. I have no idea if it was ceramic cup that was washed away from the river, a ceramic cup that was used to clean a pipe and then busted up, a piece of a ceramic mug that someone dropped that broke apart and then was washed away. Or something even more exotic.<br><br>So now I am here. I can’t seem to find anywhere that has a comprehensive list of ceramics used in the Chicago area that I can compare it to. I have tried local institutions or websites but they don’t really have any good resources. Local antique stores seem like they may be mostly private collectors that are really only concerned over their own items.<br><br>So where else can I turn to? Should I try and contact museums? How could you even contact them? Is there an academic group I could go to?<br><br>TLDR Chicago, Lake Shore, found a cup, want to know where it came from, where would you go next?