Why anyone wouldn't understand the difference between the "Atlantis" and the "Magnum" model Brita products is a mystery to me. That said, Brita still looked for help when they chose to redesign their packaging.
While at Hornall Anderson Design Works I helped by thinking about a product naming system and the information design for the packaging.
Information Design
Visually presenting concepts and ideas for the naming system helped communicate the ideas to the team.