I was just browsing menus online for bars with a view in Tokyo, and I came across this unbelievable drink on the menu for the Ritz-Carlton's lobby bar on the 45th floor of the Tokyo Midtown building:"The Diamond is Forever Martini" -- Chilled Belvedere Vodka with a hint of fresh lime juice, stirred or shaken to perfection, over a crystal clear one carat diamond"
"That price includes drink preparations tableside, a serenade of "Diamonds are Forever" as a cut stone slides to the martini glass bottom, and later a ring mounting by a local jeweler."
One suggestion, if your buying this for someone other than yourself, you probably should warn the woman to sip it slowly through her teeth.