Reddit mentions of Jokari Fizz-Keeper Pump Cap (5002)

This is a r/hailcorporate thread, right?

Carbonation preserving brand!

Here. This should help you.

It's one of these.

Yeah, that's tough. U could do the natural way in a 2 litter bottle too though. Just gotta get one of those soda pumps to keep the fizz.

https://www.amazon.com/dp/B00004XSH3/ref=cm_sw_r_other_apa_i_owZBDbTPMHQ3S

I've never actually used one of these but the reviews on Amazon seem positive:

http://www.amazon.com/Jokari-Fizz-Keeper-Pump-2-Liter-Bottles/dp/B00004XSH3/ref=pd_sbs_k_4

http://www.amazon.com/Jokari-Fizz-Keeper-Pump-2-Liter-Bottles/dp/B00004XSH3

OP should have used 2-liter bottles and this.

They sell bottle caps with pumps on them so you can re-pressurize the bottle after you pour some out. That's the best way to preserve your fizz.
http://www.amazon.com/Jokari-Fizz-Keeper-Pump-2-Liter-Bottles/dp/B00004XSH3

If they've already carb'd up, maybe you could open a couple, let them go flat and re-bottle with some priming sugar? Or just transfer and use something like this to pump it back up. Oxidation shouldn't be an issue if you are planning on drinking them within a day or two.

If they haven't carb'd up you could just transfer.

The image won't load for me, but amazon has some things like that: http://www.amazon.com/Jokari-Fizz-Keeper-Pump-2-Liter-Bottles/dp/B00004XSH3/ref=sr_1_2?ie=UTF8&qid=1341941239&sr=8-2&keywords=carbonation+saver for example. I bought something in a CVS once that went over the top of a can of soda and kept it fresh allegedly, but it didn't work for me. I didn't try one like this though, might work better.

leave the air in

this might help too: http://www.amazon.com/Jokari-Fizz-Keeper-Pump-2-Liter-Bottles/dp/B00004XSH3

This would be an easy experiment for you to do. In short as others have said, no. However if you squeeze it to increase the pressure and reduce volume of air and have it stay in that state, then yes. Squeezing and capping a 2L of soda will get you some flat soda incredibly fast though, faster the emptier it is.

Products exist to solve the slow soda drinker's frugality dilema. http://www.amazon.com/Jokari-Fizz-Keeper-Pump-2-Liter-Bottles/dp/B00004XSH3

your plan might work reasonably well if you got one of these https://www.amazon.com/JOKARI-5002-Jokari-Fizz-Keeper-Pump/dp/B00004XSH3 but you'd probably be better off just getting some canned beer.

1. You can buy one of these to preserve the carbonation in the bottle, thus increasing it's shelf life.
   
   
2. Metal transfers heat faster than other materials. Cans cool down faster, but they also warm up faster. A chilled glass is probably the best way to serve a carbonated beverage.
   
   
3. Insulated coffee cups keep hot things hot and cold things cold. If you invest in an insulated coffee cup, like this one you can make your beverages portable, although the container isn't disposable, which can cause issues.
   
   
4. According to this page, you can purchase 24 cans of Pepsi at 7.25 cents per ounce and a two liter at 2.2 cents per ounce. This means that if you drank a third of the two-liter and then threw the rest of it away, you would still save money over an identical volume from cans.
   
   
5. Environmental impact. While the materials used for both cans and two-liters are recyclable, the volume of material used to contain a two-liter (plastic) is less than the volume of material used to contain cans (cardboard, aluminum).