In this video, Motley Fool consumer goods analyst Blake Bos takes a look at the David vs. Goliath story playing out in the soft-drink industry today as disruptive little SodaStream (NASDAQ:SODA) takes on the biggest names in Big Soda, Coke (NYSE:KO) and Pepsi (NASDAQ:PEP). Blake tells investors why SodaStream products can be a healthier and more environmentally friendly alternative to Coke and Pepsi and why SodaStream's massive growth recently could have the big guys in this space nervous and losing market share.