Even amateurs have SodaStreams now, but if someone's serious about making things sparkle, a plain tank of CO2
and a hose is much more versatile, and vastly cheaper to refill. Mahoney went over how to build your own soda-making setup
back in June, and it's still an excellent idea. Pre-carbonate a dozen 2-liter bottles of cocktail before a party, and you're off the hook for mixing drinks during the event.
You can buy a pre-assembled gas regulator kit for your friend, instead of building it piece by piece: one end screws onto a CO2
tank; snap the other end onto a bottle of liquid and you're done. Give this to your most seltzer-addicted friend.
not included), $99