This document discusses units of measurement for liquid capacity. It explains that milliliters (mL) would be used to measure eye drops, with an example eyedropper holding 2mL. Liters (L) are the unit used to measure larger volumes, like containers - examples given are containers of 1L, 2L, and 5L. It also provides conversions between mL and L, stating that 1000mL equals 1L.