This cap was one of several I bought on my visit 
to LEGOLAND California, August 7, 2004. 
They are adult size, and they had about 50-100 on 
the shelf when I was there, and they were only
$12.95US each.
The keychains were plentiful too, Classic Space
torso in blue, no LEGO logo on the back, and 
they cost $3.95US each.