16 C.F.R. § 500.29
(a) A combination package is a package intended for retail sale, containing two or more individual packages or units of dissimilar commodities. The declaration of net quantity for a combination package will contain an expression of weight or mass, volume, measure or count or a combination, thereof, as appropriate for each individual package or unit: Provided, that the quantity statements for identical packages or units shall be combined.
Examples