Goldschlager is "the original" hot cinnamon schnapps and famously has honest-to-god genuine 23 karat gold leaf (24 is pure) floating in suspension in the bottle. According to Wikipedia, this amounts to less than a tenth of an ounce but that's still worth about $3 on the open market at today's prices. That's like a coupon in the bottom of every bottle if you strain it out and figure out a way to actually sell it. There's a great write-up on someone extracting and weighing the gold at Cockeyed.com.
The proof is listed variously as 87pf and 80pf... we've opted to list it as 80.
Diageo has recently turned over the distribution and marketing of this brand to Global Brands and we list them as the current best marketing website.