Vintage Coricidin 25 Tablet Bottle w/Label & Cap! Guitar Slide Duane Allman

A makers mark on the bottom looks to me like a “W” inside a circle. I couldn’t get a good photo of it. Also “57” on the bottom. Original Cap. Beautiful collectible condition!

I actually don’t know anything about Duane Allman’s guitar slide, but that’s how one that looks identical to this one was described in an eBay listing.

Inner diameter looks to be 7/8” and the length looks to be 2-3/4”.