For medical reasons, I am hoping to determine a method I can easily use to decarbonate beverages that I enjoy to help to significantly reduce the carbon dioxide bubbles of the beverage / pop / soda.

The problem being I know only know a few solutions to this and neither are convenient:

  1. Mildly agitate, then open the beverage, and then let sit for several hours.
  2. Purchase decarbonated syrup (e.g. SodaStream) and mix them without the carbonation.

I recall many years ago commonly seeing decarbonated Orange soda at the fountain of a store; but have not since.

My goal is to have a method of being able to obtain a cold beverage from the fountain, bottle, or can and be able to consume the beverage without the fizz or the gas once it hits my system within 20 minutes at most... of course doing so without greatly obscuring / fouling the test of the beverage.

Has anyone determined some basic steps to accomplish this goal that is portable, convenient, and doesn't foul the flavor?

  • Outside the scope of this site, but for context I should mention that the health effects of carbonization is still a contested issue — bbc.com/future/story/… Sep 13 '16 at 17:42
  • Also, some kinds of medical conditions that might require you to cut back on carbonated beverages are related to the acidity of the drink, and I'm not entirely sure that merely "flattening out" the drink will change the Ph much. Oct 6 '16 at 16:46
  • You might want to head over to Youtube to check this out. Mentos decarbonate sodas very, very quickly.
    – Χpẘ
    Mar 28 '17 at 0:37
  • @Χpẘ: as far as I can tell, Mentos de-juice the entire bottle at the same time, very very quickly :)
    – virolino
    Jun 25 '19 at 10:43
  • 1
    @CRSouser: can you elaborate a little on the medical issue, and the connection with the carbon dioxide? I have my own health problems, and I know that the carbon dioxide is the smallest problem in a beverage. Sugar, preservatives, coloring, and other additives are far more dangerous.
    – virolino
    Jun 25 '19 at 10:48

10 Answers 10


I despise carbonated beverages so I often flatten my drinks. In order to meet all your acceptance criteria (namely, portable and works for cans) the solution I suggest is simple. Carry around a plastic sports bottle... must be strong enough to handle pressure but have an easy to operate lid.

  1. Transfer contents of carbonated beverage into bottle
  2. Slightly shake, to build up pressure. Open lid to release pressure.
  3. Repeat step 2, shaking a bit more each time, until all carbonation (or as much as needed) is gone.

This process usually only takes a few minutes. With beverages in plastic bottles you can just use the bottle itself. With glass bottles (and clean hands) you can form a seal with your finger or thumb and do the same process. But for cans the easiest way would be a separate bottle.

  • One of the only answers that doesn't include adding ingredients like sugar/salt that will change the flavor of the drink. Oct 6 '16 at 16:48

Not certain about the practicality of this solution, but as a child I discovered that putting the chewed end of a stick of liquorice [the real stuff, made of 'wood'] into a fizzy drink would flatten it in seconds.

The reality is likely not the liquorice itself, but the very large surface area it would present.

As an adult I've never actually tried to reproduce this, but perhaps something like a paint brush [clean of course] would reproduce that large surface area.


Add sugar. A spoonful of sugar will bring a lot of CO2 out of solution at once. The beverage will fizz furiously, so don't fill the container to the brim or you'll spill some.

Adding surface area will help too. I've done this by inserting a teaspoon, but that's too slow. I haven't tried this, but maybe using a tea infuser (an egg-shaped strainer made to contain tea leaves) is better (more surface area): stir your drink with the (empty) tea infuser.


As children, we used to put a strip of clean folded tissue/paper towel in the glass. You might have to repeat a few times.


Nothing needs to be added to soda to remove the fizz. The gas can be removed mechanically.

Loosen the top of the container until you hear the characteristic "woosh" of the pressure being released from the bottle.

Drive the carbon dioxide from a soft drink by striking the side of the [plastic] container with a heavy spoon/butterknife handle.

The sudden jolt will immediately drive the gas from the liquid. Start with a light tap so the soft drink will remain in the container without overflowing. Repeat, gradually increasing the force of the "taps." After a few knocks, the drink will be nearly flat.

This will work better if the soda/pop is at room temperature. A warm liquid cannot hold as much gas than if it's cold.

Chill the flat liquid for consumption if desired.

Try it. It works.

  • This does not meet several of the OP's criteria. Jun 19 '19 at 18:10
  • @JamesJenkins Kindly read the OP's criteria, carefully re-read my answer; and, list one.
    – Stan
    Jun 19 '19 at 21:42
  • "This will work better if the soda/pop is at room temperature" <> "My goal is to have a method of being able to obtain a cold beverage from the fountain, bottle, or can and be able to consume the beverage without the fizz or the gas once it hits my system within 20 minutes at most" Jun 19 '19 at 22:47
  • @JamesJenkins I believe you have misinterpreted my answer. A key word was referencing efficiency, "better." "Better" is a comparative term rather than an absolute, or exclusionary one, or for specifying a necessary condition. IOW, the procedure can be used under most any circumstances with varying success. YMMV with temperature. Better? Otherwise, guilty.
    – Stan
    Jun 19 '19 at 23:27

PV = nRT So - Use a vacuum pump. ultrasonic bath will do it, outside of this equation Other suggestions touch on the portable but not automated methods.

Last one: Maybe take a big syringe that's attached to a flat rubber cover for drinks. Cover your glass and pull back on the syringe several times. There are several YouTubes on how to do this.


A gas is less soluble in a warm liquid. Get with twist caps, open the cap and let them sit on the counter for a day, replace the cap, and put them in the fridge.

  • Heating or boiling the beverage would be even more effective, although it has some drawbacks - unless you like flat hot beer, champagne or whatever carbonated beverage.
    – Pere
    Dec 24 '16 at 19:13

Add salt. Upon adding salt, the beverage will fizz furiously. So make sure that the container is not full. I used to add little salt and it would reduce the gas in beverage. I know that adding too much salt -- to completely decarbonate -- will change the taste of beverage, but once try it by adding little amount of salt.

If you are interested to know how salt can decarbonate soda, check here.


Pouring over ice will remove a lot of the fizz.


Pour it into a glass, fast, then let sit for a moment

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