Tin Cup Ball Liner The Tin Cup Ball Liner enables you to make your mark with a personalized mark. Based on USGA Rule 12-2 that states all golfers must be able to identify their ball during play, the Tin Cup Ball Liner will make it easier for you to identify your golf ball. It is an ideal gift for tournaments, corporate outings, birthdays, wedding parties, holidays, and personal use to simply play golf and have fun. Additional features: Made in the USA Stainless steel Guaranteed for life It was voted one of the best new overall products at the 2010 PGA Merchandise Show