The document analyzes different shipping options for Tripsaver, a service that facilitates sharing of returnable items among libraries in the Triangle Research Library Network. It finds that using a mix of third-party logistics and van services can provide same-day delivery to patrons while reducing costs compared to the current 2-3 day delivery model. Specifically, using UPS for items borrowed by NCSU and continuing van delivery for items requested from other universities could cut total annual costs by 2% and improve the customer experience.