Bonjoc Flag Crystal Ball Markers. Show your support for your home country or favorite team by sporting the country's flag as your ball marker on the golf course. Bonjoc golf ball markers are an eye-catching accessory on and off the golf course. Each ball marker is handcrafted with 100% genuine Swarovski crystals and is accompanied with a complimentary magnetic hat clip. Our unique products are the perfect idea for corporate and executive golf gifts and tournament prizes and awards. All of our golf ball markers are packaged in a carrying pouch for presentation and protection.