Can’t say, I’ve never had Oly from a bottle. But that article makes it sound as if the “dots” were molded into the glass of the bottle itself, not printed on the label (the bit about running a thumbnail down the middle of the label).
Does anybody remember the neon boxes and cans from the 1990s? Here’s the only picture I’ve been able to find. Not the can I remember, though. The one I remember was the black can with “Oly” in cursive, without the background, and in graduated colors.