> It should be noted that the product is still sold today, but in a bottle that does not give you a "Shock in the Shower".
Based on the depth/access to information presented, the writer was likely an employee or bought on for the investigation. So they probably didn't want to embarrass their employer. (Also the article is from 1997, so it was 19 years ago from their perspective)
This description sounds like someone in the US in the 70s might be able to recall which brand it was.
A quick search also finds someone with a similar experience many years later, probably different brand since the original manufacturer would've learned to avoid it:
http://jayderose.blogspot.com/2006/09/my-shampoo-shocked-me....
That said, if I had to guess I'd offer two candidates that stand out in my head. First is Farah Fawcett Shampoo. Full color picture of the woman, though the bottle shape was forgettable. Second is Body on Tap: "made with 33% real beer", or something like that. I mention it only because the bottle was cone-shaped ("artistically designed"?), and if the claim is true maybe the beer adds extra loose electrons, I dunno. Or it very well could have been any number of shampoos that showed up briefly, didn't sell, and was yanked so fast even us olde parts who were there don't remember them.
EDIT: or maybe I should read the whole article, as it mentions at the end that it's still sold, which eliminates my two candidates.