I have not yet seen Jason Latimers much talked about crystal cups routine, and hope to watch him work soon.
There are bound to me others experienting with clear cups for ages, whether published or not, so I wouldn't take anything away from his routine just becasue someone published something similar first.
But, in the interest of magical history here...
In the early 1990's, there was another clear cup routine developed and marketed, albeit in limited supply, by "Lee Illusions", a one time partnership of magicians Don Moody and Ray Witkowski in the Warrendale, Ohio area.
The routine was marketed under the name "The Clear Chop Cup" (I believe) and included moves and a routine written up by Tom Craven.
The Cup was a plastic, cut-crystal looking clear goblet, with a red ball. I am not familiar with the moves, but the cup in part was gimmeded with a half-length mirror-glass-style gimmick that allowed a magnetized ball to hide behind a mirror and when released in normal chop cup fashion, it visibly "appeared" under the cup.
To my knowledge, Lee Illusions does not exist anymore, however one of the partners, Ray Witkowski does still build customized illusions out of New Wilmington, Pennsylvania. I know he is a member of Ring 2 youngstown and Assembly 157 Beaver, PA if anyone is interested in the cup, history, or whether or not it is still available.