CO2 & Refills
Soda Maker CO2 Refills: What to Know
How soda maker CO2 refills work: cylinder sizes, quick connect vs screw-in, refill and exchange options, costs, and safe handling.
Pick a sparkling water maker, then keep it fizzing without the guesswork
Plain picks and side-by-side comparisons for countertop carbonators from SodaStream, Aarke, Breville, Philips and Ninja. We also answer the everyday questions about CO2 cylinders, bottles, syrups and running costs.
Latest guides
Bottles, Syrups & FlavorsHow Much SodaStream Syrup Do I Use?
How much SodaStream syrup do I use? Use about one capful per liter of carbonated water, a 1:9 syrup-to-water ratio, and adjust to taste.
Brand Face-OffsAarke vs SodaStream: Which Sparkling Water Maker Wins?
Aarke vs SodaStream comes down to finish, fizz control, bottle setup and CO2 swaps. Compare the Carbonator 3, ART and TERRA to find your fit.
Bottles, Syrups & FlavorsBest Bubly Drops and Flavor Drops for Seltzer
Compare Bubly drops and other flavor drops for seltzer, from unsweetened fruit essences to sweetened soda flavors, and choose the right fit for your glass.
Machine PicksBest Carbonated Water Makers for Plain Sparkling Water
Compare the best carbonated water makers for plain sparkling water, with picks for easy CO2 swaps, electric controls, compact counters and design.
Bottles, Syrups & FlavorsBest Syrups for Italian Soda at Home
Compare Italian soda syrup picks for fruity, sugar-free and cream soda drinks. Learn how to choose a flavor, mix a balanced glass and avoid common mistakes.
Bottles, Syrups & FlavorsBest Ninja Thirsti Flavors to Try First
Compare Ninja Thirsti flavors, from zero soda drops to fruit and lemonade choices. Find a first flavor that fits your taste and how you serve drinks.
Machine PicksBest Premium Sparkling Water Makers
Compare premium sparkling water makers by bottle, controls, drink options and CO2 setup. Find a countertop carbonator that fits your kitchen and routine.
CO2 & RefillsBest Simpli Soda and Quick Connect CO2 Cylinders
Compare Simpli Soda CO2 with SodaStream and Soda Sense Quick Connect cylinders. Check machine fit, pack size and return options to choose the right refill.