A mini-fridge + 20 cases of Coke is cheaper upfront and in the long run.
A four pack of two-liters is $4: http://www.samsclub.com/sams/coke-4-2-liter-bottle/prod96004... which is 18 cents per 12 floz.
As for the size of the pod, a cap of syrup smaller than one 12 oz drink's pod can make that same liter (though the Kold doesn't have a CO2 cartridge, so I'm sure the tech transfers the fizziness to the pod somehow)
0. http://co2doctor.com/ (site down at the time this comment was posted)
1. http://www.ebay.com/sch/co2doctor/m.html?_nkw=&_armrs=1&_ipg...
Part of the reason why, I suspect, is because they aren't aiming for 1:1 parity, they want "healthier" so they can put it on a billboard. Ultimately result is that they taste like diet drinks (only with more sugar).
Also "carbonation beads stored within the pod"
I can buy Coke cans at Costco for around 35 cents/can or close to 3 cents an ounce. Why would Keurig think that I'd want to pay 5+ times more for the "convenience" of buying a big expensive machine to let me "make" coke at home!?
And those capsules look big (which is probably because there's so much sugar in soda, they can't make them tiny. Probably about 1/4 the size of a 8 ounce can of coke.