We will be comparing lipid tolerance in critically ill neonates receiving pharmacy-prepared syringes of 20% soybean oil-based lipid injectable emulsion taken from commercially available, FDA-approved products that use either a glass or plastic packaging container. The primary outcome variable in assessing lipid tolerance will be serum triglycerides. A two-way analysis of variance (ANOVA) will be employed to assess the differences between lipid injectable emulsion products. The two independent variables are 1) Lipid Container (or Treatment) and, 2) Time (over 7 days); while the dependent variable will be serum triglycerides. If significant differences are detected by ANOVA, then individual differences will be further evaluated using Bonferroni tests for pair wise comparisons. All data will be expressed as the mean ± SD with statistical significance set at a p-value of <0.05. Analysis will be done at BIDMC under the supervision of the study PI. Although not expected to play a significant role, drop-out and missing data will be adjusted accordingly.