Relationships and developments are getting increasingly convoluted as the action heats up on the latest battlefield between arch rivals Coca-Cola and PepsiCo: the emerging at-home beverage-making market. This week, SodaStream, which has partnered with PepsiCo on a current, limited test of Pepsi HomeMade - a system enabling consumers to make versions of Pepsi soda brands at home - reported so-far positive consumer response, even as PepsiCo CEO Indra Nooyi publicly criticized the products' flavor.