I designed a complete point of sale system for the submarine project: business cards, a 3D-printed card holder, toiletry bottles with screwable caps and printed labels, envelopes, with-compliments cards, and a laser-cut, spray-painted dieline.
The bottles were the hardest part. I printed the body and cap four or five times, adjusting dimensions each round until the thread seated properly, then printed four final sets at different sizes for different labels.
Every printed piece was produced double-sided and the business cards were laminated.