Responding to the comment below... the top of the bottle is just the neck of the bottle stretched and repeated to look as close to a real bottle top as possible. Then I copied and pasted the yellow ring from the original graphic... that does two things: one, it lends some realism (the ring actually stays when you open a bottle) and two, it makes your eye accept the not-so-good rendition of a bottleneck by breaking it up a bit. I searched for a real image of an empty Pepsi bottle, but alas, that's not the kind of thing most people post onine. (surprise, surprise!)
Apologies in advance if you want to post a comment to our blog... it doesn't seem to be working for me today.