Drinks sold in 4, 8 and 12 packs
A drinks brand sells its flavors in 4-packs, 8-packs and 12-packs. Its mailers hold one, two or three cartons, and a customer can mix flavors and pack sizes in one order.
With carton families, Parcello counts cartons instead of packs and spreads them across the mailers. Four cartons ship as two mailers of two, five as three and two, and different flavors share a mailer. The smallest mailer is marked as a last resort, so it is used only when nothing else fits.