Was the Tennents' Sixes ever a big cup?

Question

What I would like to know is did teams take it seriouly and did first teams player play in it or was it a reserve team cup?

Answer 1

This was a televised event and first-team players took part.
It was good to watch and a pity it didn't last long.
I seem to remember Dundee won one of the competitions, possibly around 1988.