I own shares in both companies.
Given that coke is already a large manufacturer of flavors and is already a leader in the industry in selling to bars and fast food companies tap based soda, converting to the consumer and the environmentally conscious consumer should be an easy one.
SodaStream already created the device and the idea, Coke could easily swallow this tiny company and have coke only! at every home whether you make it yourself using the SodaStream machine or buy a can once in a while.  The profits I believe are in the flavors, so this should be an obvious merger.