How to keep the fizz in your coke bottle longer?!
How to keep the fizz in your coke bottle longer?
My partner's father seems to think that if you squeeze the air out of a plastic coke bottle after you have poured drinks, it seems to keep it fizzy for longer? Does anyone know if there is any sense or proof in this?
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Preventing Flat Soda
Question - I was once told that if you have a half full 2L bottle of coke, and you squeeze the sides together to create less air in the bottle, that the soda will not go flat as fast. I could understand how this could work. I think it would have something to do with partial pressure. My instinct tells me that there may be more to it than that. So… What is the best way to keep my soda from going flat?
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Ben,
Quite the contrary. Squeezing the bottle as you described and then capping it will produce a less than 1 atmosphere pressure condition inside the bottle because the flexible container will try to return to its original shape. The reduced pressure inside the squeezed bottle will encourage the carbonation to be released from solution. This will make the soda go flat sooner.
To keep the soda from losing its fizz, it should be stored capped, cold and at an elevated pressure. I purchased a cap that enables one to re-pressurize the bottle. One screws it in place and then operates a little pump that is part of and affixed to the center of the cap. I purchased mine at a Wal Mart.
Regards,
ProfHoff 334
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Keeping a higher pressure on the liquid in the 2L bottle (by squeezing the bottle) will help to keep the carbonation in the beverage to some degree. Another way to keep your soda from going flat is by keeping the soda as cool as possible between uses. The solubility of carbon dioxide in water is higher at elevated pressures as well as lower temperatures. A third way is to minimize the number of times that you open and close the 2L bottle. Every time you unscrew the cap and pour some soda into a glass you are lowering the pressure that the dissolved CO2 in the soda has worked so hard to maintain. When you close the bottle and return it to the fridge the remaining dissolved CO2 will escape again to form another equilibrium condition governed by Henry's Law (that's another topic). With each successive depressurization of the bottle you lose an exponentially decaying amount of CO2 gas until you are left w/ colored sugar water or even worse yet colored aspartame water (diet drinks).
-Darin Wagner
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Keeping the coke cold (but not frozen) would be a big factor since the solubility of CO2 is greater at lower temperature. Reducing the "head space" by squeezing the bottle would also help since the smaller gas volume reduces the amount of CO2 in the gas phase. Obviously, keeping the bottle closed is also important.
Vince Calder
Source(s):
http://www.newton.dep.anl.gov/askasci/ch...
Sry, I dont think u can!
replace the lid
It really doesnt do any good, trust me. They sell things at kitchen stores that can pump the air out of the bottles (they just double as the cap) and they work pretty good.
My advice....just buy cans.
There is no reason in the world that I can think of why this should work. At least not from a scientific standpoint. (And I have a physics degree). The only way to keep the fizz in it longer is to keep it as cold as possible without freezing it.
suspending a metal spoon in the neck of the bottle also keeps a carbonated drink fizzy, for some reason.
I used to have a device that fitted to Coke bottles and pumped the air out leaving a vacuum which meant that the carbon ( fizz) didnt have to fill the gap , which meant it would stay fizzy for 3-4 days not a couple of hours.BTW have been looking for one with no luck for ages so if anyone knows where.....
yes that is true as the carbon dioxide has nowhere to escape and so keeps its fizzz longer.
I do the same thing, and the reason I do it is because when you squeeze the soda to the top of the bottle leaving no open air you are taking away the space that the co2 bubbles can be released into. Take a bottle of soda and take a big gulp leaving some air in the top of the bottle. Now squeeze the bottle and you should be able to push it in a little. Now Shake the bottle well making sure it fizzles real good ;) squeeze the bottle again and it should be noticeably harder then when you had just put the cap on. Thats how I reason less CO2 escaping the bottle when the soda is pushed to the cap :) hope it helps ;)
keep the top on
Actually, to my knowledge the creation of a vacuum may be more likely to promote the CO2 gas to come out of the soft drink, as it tries to fill the void in the bottle.
There was a replacement cap you could buy that actually worked like a pump. A few presses on the cap would allow air to flow into the bottle but not escape, thus pressurizing the bottle again and helping to keep the carbon dioxide in its place within the liquid.
Of course, the best way to keep the fizz in the drink would be to transfer it to a smaller bottle so that it is mostly liquid and very little place for the gas to escape.
Or like someone else mentioned, just buy smaller bottles or cans and open them as needed. Just remember to recycle when done and get your deposit back.
yes this is true and does make sense - which may be more than my pseudo scientific explanation will do!!
it is to do with pressure, higher pressure in the bottle keeps the gas bubbles in the drink, reducing the amount of space for the escaping bubbles to fill means the bubbles escaping create pressure in a smaller space=more pressure..
you can buy bottle stoppers with little pumps in them which produce teh same result but by filling hte space in the bottle as full as possible with air, leaving less space for the bubbles of gas and again creating more pressure on the bubbles still in the drink..
Don't open it.
Dont buy coca cola!
Viva Fidel!!!!