19 Sep 2018 --- Premier Protein shakes will now feature FSC-certified – meaning the materials used have been responsibly sourced – Tetra Pak cartons and a re-sealable plant-based cap derived from sugarcane. Consumers are ever more mindful when it comes to making purchasing decisions, both in terms of personal nutrition and environmental footprint. Premier Protein – a line of shakes, powders, bars and clear drinks – has launched its new Earth First packaging for its ready-to-drink shakes, hoping to attract sustainability-seeking consumers.