Potential study subjects will be identified by neonatal intensive care unit physicians at BIDMC who have determined intravenous nutrition support is clinically indicated. Parent(s) or guardian(s) of the NICU patient will review and sign a written informed consent form. The form will be obtained by NICU physicians or one of the co-investigators listed above. Prospective parents or guardians of the patient will be presented, in lay terms, the two options for providing intravenous lipid emulsions. The purpose of the study and current data regarding the standard of care will be presented to parents or guardians of the patient, and that assignment to either group (glass vs. plastic) will be random or determined by chance. Parents or guardians will be informed that participation is completely voluntary and that all patient data will be kept confidential. All aspects of this study will take place in the neonatal intensive care unit.