Both sides shoulder the risk and reap the rewards when package clicks with consumers.

A grown-up version of the Tetra Brik, Prisma is an octagonally shaped, grippable carton that is helping one-time niche products go mainstream. Three beverage companies are making a splash with products packaged in Prisma, and all of them are tapping copackers to pull off processing and packaging. The most recent is Boulder, Colo.’s Horizon Organic Dairy, which contracted with Elma, N.Y.-based Steuben Foods to package an 8-oz. single-serve version of its reduced fat organic milk.