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 (SODA) takes on the biggest names in Big Soda, Coke (KO -1.00%) and Pepsi (PEP 0.95%). 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.