sentences:  The Tetra Laval Group is controlled by the holding company Tetra Laval International, whose board of directors include the three children of Gad Rausing.Tetra Pak operates globally through 40 market companies, which are subsidiaries to Tetra Pak International SA, doing business in over 170 countries.Because of the low relative cost of its end products, the developing world has been an important market for Tetra Pak from the start.