In a related subject (kinda), they make a pump for wine bottles that works the opposite way. It pumps the air out of the sealed bottle so that there is less oxygen to spoil the wine.

I don't know what you would do to preserve sparkling wine or champagne. I guess you should transfer it to a 2 liter bottle and use Phobia's solution on it because it would fix both the spoilage problem and the fizz-loss problem.

I remember watching Mr. Wizard a long time ago and this question came up. He showed the best way. Simply tighten the cap and turn the bottle upside down for a split second and then right side up. You'll feel the pressure in the bottle start to fill up. The same way it was before you initially opened it.

This works the best.

I knew it!!!

"Must be a duck under the chair", "that dog won't bite you", "you'll run faster if you put your shoes on backwards"...

I learned to never listen to Phil after that last one.

You may feel the pressure, but when you drink it it will be flat.

You are correct, Sir. All turning the bottle upside down does is speed up the time of dissolution of the CO2. In essence you are just reaching the condition of equilibrium faster. Once you open the bottle, conditions change and bye bye CO2.

just drink water.

I don't drink 2 litres in 1 day or 2 days. Thats the problem . I usually drink a half a glass a day. 2 litres are less expensive than cans so there's the dilemma.

squeezing doesn't work. The co2 wants to leave the liquid.

You have to pressurize or more co2.

One drop of Dry Ice and kabooom or good fizz.

I am getting a fizz keeper/pump cap. But even that doesn' work for long.

If CO2 was leaving the liquid after you squeezed the bottle, it would return to full form. CO2 needs an air mass into which to intersperse. If you take all the air out of the bottle, the CO2 has no where to go.

Phob's method works although it makes for unbalance bottles at times and wont apply when the bottle is 1/3 or less full. That where the pump exceeds these other methods.

Bullshit, the CO2 does not need "an air mass into which to intersperse". The CO2 is going to come out of the soda regardless. I have heard of Phob's idea working before, and I am trying to reason out why it works in my head. I will get back to you when I have a better explanation worked out.

If you're going to try the Dry ice theory, I'd also recommend a placebo.......wad up some aluminum foil and put it in a bottle with a half cup of snowbowl.

Close both lids tightly, set them on the table on either side of you and have someone video from a distance, so we can see the results.

Explain how I can squeeze a 2 liter until the liquid is up to the neck, leave it in the fridge for a week, and there is still the same small amount of airspace up there and the soda is still fizzy.

I am thinking that it has to do with the pressure needed to return the bottle to its original shape. If the bottle can hold pressure against the contents of the bottle then it is essential doing the same thing as the pump cap.

Try this...take an empty bottle 2L bottle, squeeze the bottle slightly without making the plastic crackle. Next replace the cap without letting go of the bottle. Finally open the bottle like you normally would.

Result, the bottle returns to its original shape because atmospheric pressure is enough to push the sides of the bottle back out.

Repeat the experiment a second time, only this time squeeze the bottle enough to make it crackle, putting some creases in it.

Result, the bottle does not return to its original shape.

Why? It takes more than atmospheric pressure to push the sides back to their original shape.

How much more pressure is needed? Well, blow into the bottle to return it to the original shape. It takes the extra pressure that you generate in your lungs.

i got the answer. Guess i wont buy a fizz keeper. They don't work well.

Here are the answers from chemistry people. Strange. One says squeezing wont work and the other says it might.

http://www.newton.dep.anl.gov/askasc.../chem00544.htm

Another link on keeping fizz.
http://www.stevespanglerscience.com/experiment/00000103

I could have told you all at one time.....my X worked for Coca-Cola.....It was amazing what they did and the cost of a soda was 5 cents....go figure. :rolleyes: No wonder they make money and no one else does!:mad: