In response to your post, BadNick (it seems all I ever do in this thread is follow-up responses)... I managed to find this video of the process, most probably produced by the very same artists you've portrayed above.
(sorry about any possible advertisements, and the music, too)
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Additionally, I happened upon this contest, currntly being held by the Heinz Co.
Heinz Ketchup Creativity 2010"Since 2006, aspiring young artists have delighted America with delectable Ketchup packet designs.
The program promises more excitement in year four with bigger and better rewards for students and schools.
Through the Heinz Ketchup CreativityTM Contest, students from schools across the U.S. in grades K-1 through 12
are invited to show their creativity for a chance to have their artwork appear on millions of Heinz® Ketchup packets!
For the first time in Ketchup Creativity history, one of the top 12 winners will be chosen as the grand prize winner and
his or her artwork will appear on approximately 2.5 million Heinz® Ketchup bottles, in addition to the single-serve packets.
To top it off, that student will receive a $5,700 cash prize for the distinction as Heinz's first Ketchup Creativity bottle artist and grand prize winner."
PAST WINNERS' GALLERY