For years, I've been marking my golf ball with the Pi symbol. To varying degrees of success.
Now Tin Cup has has made what I feel is my personal ball marker.
Based on USGA Rule 12-2 that states all golfers must be able to "identify their ball" during play, they believed there was a need to create something unique as a way to personalize each players golf ball.
Tin Cup is 100% "Made in the USA" and patented. It is a stainless steel ball marker that is guaranteed for life. It was voted one of the best new overall products at the 2010 PGA Merchandise Show and the Tin Cup has quickly gained industry and consumer recognition for its innovation and design.
What you get:
The marking pens
A handy carry pouch
More than 150 different styles to choose form, including pi. For just 19.95 at www.tin-cup.com.