An ultra-fine permanent marker works best with the Tin Cups. The Tin Cup TM Personal Imprinting System is a revolutionary new technique for golfers to mark/imprint their golf ball. The system allows a golfer to create a personalized ball using the logo or design of their choice. There are a number of logos already available. These are wonderful gift items or tournament giveaways. An ultra-fine tip marker works best with the Tin Cups.