The folks at Mostrad figured out a way to make soda on-the-go by coming up with the Purefizz Soda Maker. Gone are the days of buying expensive and hefty soda-making machines when you have this device.
The Purefizz Soda Maker is a similar size to your portable coffee mug, but does so much more. The handy little contraption is essentially a stainless steel bottle that lets you instantly carbonate any beverage. You easily can turn your water, juice, wine and even cocktail into a refreshing seltzer drink.
All you have to do is add your liquid of choice into the bottle, screw on the carbonation cap, insert a tiny C02 cartridge and shake it like a Polaroid picture -- actually, you should probably shake it more along the lines of a bartender.