You can make sparkling water at home by forcing carbon dioxide gas into chilled, still water under pressure using either a home carbonation machine or a DIY soda siphon setup. The process takes about 30 seconds with a consumer device and costs roughly 25 cents per liter, compared to $1.50 or more for store-bought bottles.
I started carbonating my own water three years ago after calculating how much I was spending on La Croix for both drinking and cocktail mixing. What began as a cost-cutting measure transformed my home…

