Fizz and Lime is an established beverage company which started bottling Wheat Grass Juice, Bitter Gourd with Jamun and Amla with Aloevera. It is planning to expand externally without compromising the unique taste of these drinks. Belligio juices got exclusive rights to manufacture and sell Wheat Grass and Amla, Aloevera under the name Fizz and Lime. Belligio Juice had to use only the ingredients supplied by Fizz and Lime to produce, bottle and distribute the two drinks. Identify and explain the form of external expansion adopted by Fizz and Lime.