Drawing and posting his 100th cartoon on Dec. 31, Hara could have taken a break, but on New Year's Day, he began the first of what he hopes to be another 100 coffee-cup cartoons in 2015.

Hara, a creative director at Columbus-based marketing agency Resource Ammirati, uses Starbucks coffee cups to create quirky cartoons. What started out as a hobby has now become a full-blown art ...