18...people keep extra tees in their Golf bags though...but there are 18 ON the golf field..as you call it.
Depends on the size of the golf tees.
There are a few stores that offer printing of personalized golf tees. One purchase personalized tees from 'The Golf Tee Store', 'Golf Tees Etc' and 'Golfers Shop Here'.
there is no such thing
Clubs, tees, balls.