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K. H. Milder
Reviewed in the United States on January 6, 2025
With earlier versions of this product you had to be careful opening the bottle by slowly twisting the pump until you heard a slight leaking of the air within the bottle, then wait until the bottle goes limp. If you didn't open the bottle this way, the pressure inside the bottle would blow the cap out of your hand with a loud bang. The version of the product I just purchased seems to have a built in pressure release, so partially turning the cap releases the pressure in a controlled manner—a great improvement. What needs improvement is the pump mechanism itself. The pump does not work for the full length of the pump stroke, so only a small amount of air goes into the bottle per pump. It takes forever for a half-filled 2-liter bottle to reach enough pressure to equal that of a full bottle. Nonetheless, it is worth getting if you're patient. I pump the heck out of it while watching TV. It holds the carbonation for days when pumped with enough pressure.
Chuck
Reviewed in Canada on January 25, 2025
Saves money and the quality of the soda
Mullken
Reviewed in Germany on February 23, 2024
Very easy to use and really works. Drinks stay fizzy much longer.
Marilyn Brann
Reviewed in the United States on December 8, 2024
A pumps this for like a minute and a half at least and it didn't do anything. So I'll go back to the bulb type that I squeeze which is hard on my arthritis but it works
ChadeDebi
Reviewed in the United States on December 5, 2024
I had a set of these "fizz keepers" 15+ yrs ago. My wife threw them away because she launched one to the ceiling. We'll, I decided to get two more...it was time to move past her trauma. The two new ones are absolutely crap. You have to literally pump them over 100+ times to get the pressure built up to anywhere near where it would work. I don't know if I somehow got two defective ones, or my wife sabotaged them, but they're garbage. I'm past the return window, so I will throw them away. I might try ordering two more (i know, the definition of insanity) to see if i somehow just got defective ones the 1st time. Disappointing.
al cad
Reviewed in the United States on December 31, 2024
It does work, if the bottle is too big you will spend some time pumping.
Nancy J. Whalen
Reviewed in the United States on November 21, 2024
These fizz keepers work so good. you pump air into a two litre bottle and it keeps the fizz in the pop til the very end of the 2 ltr. bottle.
E Harkins
Reviewed in the United States on October 7, 2024
I discovered these decades ago and fell in love with the simple design and helpful function. So simple to use and I love how much a can save by buying 2 liters instead of cans. If you pump it up fully, nice and firm, you can keep the last 1/4 of a bottle still fizzy. Good seal and you pump it under running water to clean them. You'll see water squirt out the bottom.I lost my last set years ago and just got these replacements because we've been drinking more soda in my house. I left the soda container in the fridge door and my kids knocked it over when they opened the fridge. So the first one broke. I consider it operator error and we're putting our bottles in the main area of the fridge. So other than that, love the purchase.
Fred Turek
Reviewed in the United States on June 23, 2023
Great for what it is, and good value for what it is, but not great for what I hoped it would be. As far as complete pumps that go directly onto a soda bottle, there aren't many to choose from and this looks like the best of them. A small, low cost way to HELP retain the fizz in soda. Being a small pump, you need to pump it a lot depending on how much air is in the bottle. Sometimes only 10 pumps, but an almost-empty 2 liter bottle might need 200 pumps and with the tiny gripper that can get old. Also it only goes up to a limited pressure which is lower then the pressure for carbonated soda. In other words, not enough pressure to do the job well, but enough pressure to partially retain the fizz. So it takes a lot of pumping and even then only partially retains the fizz, but it's great for the cost, and also looks like the best one-piece complete pump type unit on Amazon.
lorena herrera
Reviewed in Mexico on May 23, 2023
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James Nicoll
Reviewed in Sweden on March 25, 2022
I bought these with high hopes and in the beginning I thought they were working great. Sadly it turns out that as they can only pump in regular air they can never be effective. In order to retain fizz one pressurize the empty space in the container with more C02. I don't know if such a gadget exists.
Alessandra
Reviewed in Italy on April 12, 2022
Avevo un 'tappo simile', comprato chissà dove più di vent'anni fa: quello funziona ancora benissimo. Speravo che questi funzionassero altrettanto bene ma non è così perché non aspirano bene l'aria. Uno dei due non funziona. Sconsiglio l'acquisto visto il costo non indifferente.Perfette come sempre spedizione e consegna Amazon.
Twenty Haglund
Reviewed in the United States on March 1, 2018
Update:It turns out that these things do not in fact work beyond a few minutes, for no fault of their own. I convinced myself that they worked, but that was simply a psychogenic placebo effect.As you'll find if you Google or look up FizzKeeper in Wikipedia, there are a couple of laws of physics (Henry's Law and Dalton's Law) that prevent these sorts of devices from preserving carbonation, and in fact a lot of the sales of these things is to high school physics teachers, who use them in labs covering those physics concepts. And as explained in my original review below, there may be a use for Fizzkeepers in rocketry classes.===========These things allow to you pump up a bottle to extremely high pressure, and they do [not do] a good job of maintaining the fizz. However, one of mine exploded and took off like a rocket, making a dent in the ceiling, If my face had been in front of it I may have been blinded. The cap part broke off of the piston, really just one single piece of plastic. The break allowed the high pressure air in the bottle to escape, launching the cap into orbit with an explosive noise. I had been going crazy with 50 or 100 pumps. The bottle in question was only a 500-ml bottle, and it probably had 40 or 50 pumps, way too many in retrospect. But it's hard to tell how many are right. I've temporarily reverted to a similar product by Kai that doesn't allow such high pressure, but also doesn't keep the fizz as well. When my courage returns I may go back to this product, but not pump so much.
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