The bill directs the National Park Service (NPS) to establish a comprehensive program within 180 days to reduce and potentially eliminate disposable plastic products throughout the National Park System. This program aims to minimize environmental impact by targeting items such as plastic beverage bottles, carryout bags, plastic food ware, and expanded polystyrene products. Each regional director is responsible for implementing the program within their respective park units. A key provision requires regional directors to eliminate the sale of water in disposable plastic products and the sale and distribution of other disposable plastic products to the greatest extent feasible. This feasibility determination involves considering numerous factors, including the costs and benefits to overall operations, the amount of waste eliminated, infrastructure costs for bottle refill stations, and potential contractual implications with concessioners. Additionally, visitor safety, the availability of reusable containers, and input from public health officials are crucial considerations. To support these efforts, the bill mandates the development of a proactive visitor education strategy for each park unit, explaining the program's rationale and managing visitor expectations regarding water availability. Regional directors must also ensure the program is implemented consistently throughout each unit, integrating it into agreements with concessioners and cooperating associations. Furthermore, biennial evaluations are required to assess public response, visitor satisfaction, buying behavior, public safety, and plastic bottle collection rates, with findings submitted to the Director and Secretary of the Interior.