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Sarah Ganzenmuller is the founder of Ripplfect, which designs and markets her stainless steel, reusable coffee tumblers.

Courtesy photo Sarah Ganzenmuller, the founder of Ripplfect, which designs and markets her stainless steel, reusable coffee tumblers, is shown…

Sarah Ganzenmuller created this design in a Triton Regional Middle School class and is now using it in her line of stainless steel, reusable c…