Samantha Romanick, a microbiology PhD student, is the founder and operator of Black Rock Refill, a zero-waste business to help people in the Reno, Nevada and surrounding areas have options to reduce plastic waste in their lives.  Studying the biology of micro-plastic contamination in the environment, she knows intimately why we should consider minimizing our use of plastic and how to go about it. She operates her business without a brick and mortar store and still manages to make her products available to a large area.