Example on a Book layout.

Example of current design on a book style layout. Note, the type on the blurb on the back cover has just been placed, as this is just an example, nothing final.

I do like the way it looks on the book format, but I feel there is too much white space perhaps?

With a coloured background

 I personally like this version better, the lack of white space improves it but I slightly feel the bottle design is lost.