Brian Harman is making the best of his shiny, new trophy after winning the Open Championship this weekend ... 'cause the golf star turned the Claret Jug into his own drinking device!!
Fresh off claiming his first major title at Royal Liverpool Golf Club, Harman chugged a beer right from his earned hardware ... and he passed the cup around the room for his buddies to share.
It all happened at Hickory's Smokehouse in West Kirby, England ... with PGA Tour caddy Aaron Flener sharing the clips on social media.