Somewhere, deep in the vast wilderness of Colorado, there lies a town that you’ve definitely never heard of, called Boulder. Within Boulder, there lies a a pub called Conor O’Neill’s. Within Conor O’Neill’s there lies Eli. Well, actually, he stands most of the time. Eli is a bartender and an artist, and his canvas is the top of a Guinness. With a nitro spout as his brush, he goes well beyond the classic shamrock that other bartenders have sometimes been known to inscribe, to create an array of fleeting art:

Courtest of The Thrillist