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Do Carbonated Drinks Go Flat Quicker on Their Sides?

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by James Hunt

From Coca-Cola to carbonated water, there isn't a fizzy drink around that tastes better once it has gone flat. As soon as you break the seal on the bottle, it's a race against time to finish off your soft drink before the precious bubbles that make the drink taste better are depleted. The last thing you want to do is speed up that process. 

That's why we had to know: Does laying a bottle on its side make a soft drink go flat more quickly? Or is it nothing more than a consequence-free way to cram more and more of them in the fridge?

To figure out the answer, you first have to understand why fizzy drinks go flat at all. The carbonation in soft drinks is a result of additional carbon dioxide being dissolved into the liquid, which is then sealed under pressure. When the container is opened, the difference in pressure allows the carbon dioxide to form into bubbles, which then rush to the surface and escape back into the air. As each bubble bursts, the drink becomes a little less fizzy.

This process can theoretically continue until the drink contains the same amount of carbon dioxide as the atmosphere around it—though the drink will seem flat long before that point.

So does it matter if the container is on its side?

The answer: Not really. While it's true that a bottle that is lying down will have a greater area of contact between the liquid and the air inside the bottle, that's a small enough factor that any effect on the speed of carbon dioxide dissolution will be negligible. Since carbon dioxide bubbles form, or  "nucleate," on the side of the bottle, increasing the surface area between the drink and the air might actually make it go flat slightly slower if the bottle is on its side—but again, this effect isn't pronounced enough to make much of a difference over anything other than very short time scales.

What really matters when it comes to keeping a drink fizzy is the pressure inside a sealed container. As the carbon dioxide escapes, it builds up the pressure in the air within the bottle, until it's high enough to prevent bubbles forming, which keeps the liquid fizzy. The pressure inside an opened bottle of soda that has been resealed is virtually the same, whether or not it's standing up or on its side.

Things that do help keep drinks fizzy include chilling (carbon dioxide dissolves into air more readily at higher temperatures) and screwing the cap on tightly to help keep the pressure within the bottle high.

Squeezing the bottle doesn't help, unless you keep it squeezed until the next time it's opened—otherwise, the carbon dioxide will just escape the liquid and deform the bottle back to its original shape. Indeed, the fact that there's no air inside the bottle will effectively suck extra carbon dioxide out of the drink in an attempt to equalize pressure inside the container, so squeezing the bottle actually makes the drink go flat more quickly than the alternative.

And finally, those repressurizing pumps? They'll only work if you pump in something that contains more carbon dioxide than the drink. Air doesn't, so the extra air you pump in creates a high-pressure mix of mostly oxygen and nitrogen, which—if anything—helps forcibly displace the carbon dioxide in the drink by encouraging oxygen and nitrogen to dissolve.

Whew. Knowing all that, the main tip for keeping your drink from going flat before you finish it? Keep it cold until you're ready to drink it, then chug it down. Your dentists and doctors might not thank us, but your taste buds will.

Have you got a Big Question you'd like us to answer? If so, let us know by emailing us at bigquestions@mentalfloss.com.

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Why You Should Think Twice About Drinking From Ceramics You Made by Hand
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Ceramic ware is much safer than it used to be (Fiesta ware hasn’t coated its plates in uranium since 1973), but according to NPR, not all new ceramics are free of dangerous chemicals. If you own a mug, bowl, plate, or other ceramic kitchen item that was glazed before entering the kiln, it may contain trace amounts of harmful lead.

Earthenware is often coated with a shiny, ceramic glaze. If the clay used to sculpt the vessel is nontoxic, that doesn’t necessarily mean the glaze is. Historically, the chemical has been used in glazes to give pottery a glossy finish and brighten colors like orange, yellow, and red.

Sometimes the amount of lead in a product is minuscule, but even trace amounts can contaminate whatever you're eating or drinking. Over time, exposure to lead in small doses can lead to heightened blood pressure, lowered kidney function, and reproductive issues. Lead can cause even more serious problems in kids, including slowed physical and mental development.

As the dangers of even small amounts of lead have become more widely known, the ceramics industry has gradually eliminated the additive from its products. Most of the big-name commercial ceramic brands, like Crock-Pot and Fiesta ware, have cut it out all together. But there are still some manufacturers, especially abroad, that still use it. Luckily, the FDA keeps a list of the ceramic ware it tests that has been shown to contain lead.

Beyond that list, there’s another group of products consumers should be wary of: kiln-baked dishware that you either bought from an independent artist or made yourself. The ceramic mug you crafted at your local pottery studio isn’t subject to FDA regulations, and therefore it may be better suited to looking pretty on your shelf than to holding beverages. This is especially true when consuming something acidic, like coffee, which can cause any lead hiding in the glaze to leach out.

If you’re not ready to retire your hand-crafted ceramic plates, the FDA offers one possible solution: Purchase a home lead testing kit and analyze the items yourself. If the tests come back negative, your homemade dishware can keep its spot on your dinner table.

[h/t NPR]

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10 Things You Might Not Know About Eggnog
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Eggnog: you know it's delicious, but did you know it once led to a riot at West Point? In honor of National Eggnog Month (which runs all of December), join us as we raise our glasses to one of the most popular beverages of the season with these fascinating facts.

1. EGGNOG MOST LIKELY ORIGINATED IN MEDIEVAL TIMES.


Lady Macbeth by George Cattermole, via Wikimedia Commons // Public Domain

Most historians trace eggnog back to “posset,” a hot milk-based drink comprised of spices and wine, which became popular as early as the 14th century. Though it was mostly consumed as a cozy cocktail, it was also used as a soothing remedy for colds and flu. Posset remained a mainstay into Shakespeare’s era, though it was famously used for nefarious purposes in Macbeth when Lady Macbeth drugged the guards’ possets outside King Duncan’s chambers.

2. GEORGE WASHINGTON HAD A (NOW-FAMOUS) SUPER-BOOZY EGGNOG RECIPE.


Portrait of George Washington by Gilbert Stuart, via Wikimedia Commons // Public Domain

Our first president apparently enjoyed serving eggnog during Christmas at Mount Vernon; according to the Old Farmer’s Almanac, it was one of his favorite concoctions. The recipe continues to circulate widely today, even though Washington forgot to include the number of eggs needed (hey, improvise!). And here it is, in his exact words:

One quart cream, one quart milk, one dozen tablespoons sugar, one pint brandy, ½ pint rye whiskey, ½ pint Jamaica rum, ¼ pint sherry—mix liquor first, then separate yolks and whites of eggs, add sugar to beaten yolks, mix well. Add milk and cream, slowly beating. Beat whites of eggs until stiff and fold slowly into mixture. Let set in cool place for several days. Taste frequently.

3. DWIGHT EISENHOWER WAS ALSO A PROPONENT OF BOOZY ‘NOG.


Wikimedia Commons // Public Domain

One of the 34th president’s favorite ways to de-stress was to cook, according to National Journal. “By the time he left office, Dwight Eisenhower had concocted a hearty collection of recipes, chronicled in his post presidential papers,” write Marina Koren, Brian Resnick and Matt Berman. “There was his famous vegetable soup and beef stew, warm hush puppies, and lemon chiffon pie. [...] But nothing could get you drunk faster than Ike’s eggnog.”

Ike’s recipe calls for one dozen egg yolks, one pound of granulated sugar, one quart of bourbon, one quart of coffee cream (half & half), and one quart of whipping cream. National Journal whipped up some of Ike’s eggnog, and found it a “very alcoholic, surprisingly light and creamy (in density, not in richness or calories) nog.”

4. HEAVILY SPIKED EGGNOG ONCE CAUSED AN INFAMOUS WEST POINT RIOT.


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The Eggnog Riot, a.k.a. The Grog Mutiny, was a Christmas soiree gone very wrong at the United States Military Academy at West Point in 1826. Earlier that year, Colonel Sylvanus Thayer, West Point’s superintendent, had forbidden alcohol on campus. Known as the “Father of West Point,” Thayer turned what had once been an academy consisting of an undisciplined student body and a derelict campus into the respected institution West Point is today, according to Natasha Geiling in her very detailed telling of the riot for Smithsonian magazine. “Eggnog was a traditional part of West Point’s annual Christmas celebration, but Thayer’s moratorium on alcohol threw a wrench in the festivities,” Geiling writes. “Not to be denied a night of revelry, some cadets set about smuggling in liquor from nearby taverns for the holiday party.”

The cadets proceeded to get rip-roaring drunk, and the night resulted in smashed crockery and windows, broken furniture, the drawing of swords (no one was hurt), gunshots (only a doorjamb was harmed), and a knocked-down lieutenant. Once the “party” was over, 19 cadets were expelled.

The U.S. Army also has a telling of the Eggnog Riot on its official homepage, and the article concludes thusly: “Years have passed since the cadets overindulged on eggnog, but the moral of their story is still applicable. Too much of the ‘good stuff’ can lead to serious consequences. So remember this story as the holiday parties approach; let's not let one night of fun alter our future as 19 West Point cadets had.”

5. WHEN STARBUCKS REMOVED THE EGGNOG LATTE FROM ITS HOLIDAY MENU, THERE WAS A FLURRY OF COMPLAINTS..


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In 2014, Starbucks dropped the Eggnog Latte from its offerings. According to USA Today, there was immediate customer backlash. “The coffee kingpin will bring back its seasonal Eggnog Latte nationwide this month after a customer revolt spread from letters to phone calls to social media,” reporter Bruce Horovitz wrote. “It had dropped the beverage, a seasonal offering since 1986, to try to simplify its expanding menu.” Starbucks even issued an apology: "We made a mistake," said spokeswoman Linda Mills. "We are very sorry."

On its blog, Starbucks credits the very first, original Eggnog Latte to Il Giornale, a small, Italian-themed coffee chain in Seattle. Il Giornale’s owner was Howard Schultz, who bought Starbucks in 1987 and then continued the Eggnog Latte tradition at the now-behemoth coffee chain.

6. PUERTO RICO HAS ITS OWN HOLIDAY-SEASON DRINK THAT’S SIMILAR TO EGGNOG.

Coquito is a traditional Puerto Rican Christmas drink, and it’s typically made with coconut milk, rum, nutmeg, cinnamon, and, depending on the chef, sometimes condensed milk, and sometimes egg yolks. The Museo del Barrio in New York City hosts an popular annual Coquito Masters contest during the holiday season.

“Coquito is a very important tradition in the Puerto Rican community. Everyone has their own recipe,” Debbie Quiñones, founder of the contest, told the New York Times in 2009. At the contest covered in the article, one woman competed with her father’s secret recipe, which her mother had stolen for her from his hiding place: a metal safe under his bed. Another contestant used his grandmother’s recipe. “Everyone has a little quirk that they think makes it better than everyone else’s,” Dr. Frank Estrada, another contestant who was competing with an old family recipe, said. “I can’t sell it, because if I was to put a price on it, of what I think it’s worth, they couldn’t afford it.”

7. IT IS IMPORTANT TO CHUG EGGNOG WITH CAUTION—EVEN NON-ALCOHOLIC 'NOG.

In 2014, Ryan Roche of Lehi, Utah, officially became “Utah man hospitalized after chugging eggnog.” Roche’s story of eggnog chugging gone awry became national news, all because he decided to engage in an alcohol-free eggnog-chugging contest as part of an office holiday party.

According to BuzzFeed News, Roche was on his way out the door when he heard his boss yell, “Roche, get up here!” Roche then chugged a whole quart of eggnog in 12 seconds flat. “I just opened up the carton and pretty much poured it down my throat,” Roche told reporter Jim Dalrymple. “I didn’t take a breath of air.”

Roche left the party coughing, but he figured he would soon be fine. Instead, ended up in the hospital, where he spent a day in the Intensive Care Unit, and another two days in recovery. The doctors determined Roche had inhaled some of the eggnog, and he was given antibiotics.

8. EGGNOG CAN ALSO BE REFERRED TO AS A “HELL’S ANGEL.”


Wikimedia Commons // Fair Use

In Stella Gibbons’s 1932 novel Cold Comfort Farm, one of the main characters makes a beverage called a Hell’s Angel, consisting of one egg, one teaspoon of cream, two ounces of brandy, and some ice.

9. DAVID LETTERMAN LIKED TO INCORPORATE EGGNOG INTO HIS LATE SHOW HOLIDAY TRADITIONS.

David Letterman was famous for his oddball holiday traditions, such as annual target practice involving the giant meatball that topped the Late Show’s Christmas tree in lieu of a traditional star, bow, or angel. And of course, some of his odd holiday shenanigans incorporated eggnog. One year, Letterman drenched his film crew with a Super Soaker filled with eggnog. Another year, the Goo Goo Dolls performed their hit song “Name” with nothing particularly unusual about the performance ... until they dove into a giant glass of eggnog.

10. DECEMBER 24TH IS NATIONAL EGGNOG DAY.

So what are you waiting for? Find your favorite eggnog recipe. Add some booze, or don’t. Dive in. Don’t forget to come up for air. And, as George Washington advised, taste frequently!

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