BREAKING NEWS : Fort Wayne Redevelopment Commission terminates Electric Works development agreement Full Story

Festive PSA: Tapping a can of beer doesn't stop it bubbling over, scientists say

It's an automatic reflex for many of us: obediently tapping a few times on a...

Posted: Dec 12, 2019 10:29 AM

It's an automatic reflex for many of us: obediently tapping a few times on a can of beer or soda to stop it from frothing over.

But researchers in Denmark have discovered that we've been wasting our time. Tapping on a can of shaken beer makes absolutely no difference to whether it fizzes all over your party outfit.

The team from the University of Southern Denmark in Odense conducted a randomized test using 1,000 330-milliliter (11-ounce) cans of beer. The cans were placed into one of four groups -- unshaken/untapped, unshaken/tapped, shaken/untapped and shaken/tapped.

The beers were shaken for two minutes using a machine that was set to simulate the effect of riding a bicycle for 10 minutes, a popular Danish method of transporting beer.

The cans were hit three times on the side and opened after roughly a minute, with the teams weighing them before and after opening to find the mass and assess the level of beer loss.

The scientists chose to tap on the side of the can rather than on the top, because it acts on a larger surface area.

The study found "no evidence to support the hypothesised beer-saving effect of tapping," the researchers concluded, adding that the only apparent way to avoid a beer-frothing incident was to wait for bubbles to settle before opening the can.

"The idea came from as a teenager opening can of soda and later beer," Elizaveta Sopina, the lead researcher on the study, told CNN. "It's just what people do. I did it, and then I started to question whether it was actually true and effective or not.

"I was surprised, but not disappointed ... it's good to be evidence-based in your behavior."

Sopina, who is doing a post-doctorate in health economics, gathered an intrepid group of scientists from the university's PhD association to help her conduct the experiment in her spare time.

The 33-year-old from New Zealand said one reason for the tapping not being effective could be because it only affects the bubbles lodged on the inside of the can surface, and not those suspended in the beer.

The researchers noted that the study could be of social value in reducing wrist and finger injuries from tapping, and in reducing excessive beer consumption by forcing drinkers to wait before consuming their beverage. It also improves efficiency for cash-strapped students.

"Our study suggests that one whole can of beer can be preserved by allowing approximately 100 shaken cans to settle," said the researchers. "Post-secondary students, economists and other frugal beer enthusiasts are likely to find satisfaction in this fact. "

Sopina approached Carlsberg to donate 1,000 cans, but said the company had no vested interest in the outcome and were not involved in any part of the study. The opened beers were handed out afterward to "volunteer drinkers," who were mostly students.

Sopina said there had been "a little bit of disbelief from people who practice tapping and flicking," but "this will most definitely not put me off beer."

She added: "I look forward to applying evidence in my future beer consumption. And I think the beer-loving Danes will just need to exercise patience and let the bubbles settle before cracking a cold one open."

Indiana Coronavirus Cases

Data is updated nightly.

Confirmed Cases: 68433

Reported Deaths: 2980
CountyConfirmedDeaths
Marion14863719
Lake7101271
Elkhart459777
Allen3635158
St. Joseph315479
Hamilton2513104
Cass17519
Hendricks1750105
Vanderburgh172612
Johnson1652118
Porter119539
Tippecanoe110311
Clark108145
Madison84765
LaPorte83829
Kosciusko81912
Howard81065
Bartholomew74347
Marshall74222
Floyd69444
Monroe68630
Delaware63852
Noble63728
Boone63546
Dubois62612
Hancock62337
Jackson5524
LaGrange54210
Warrick51630
Shelby51126
Grant49629
Vigo47410
Dearborn46528
Morgan42532
Henry36118
Clinton3573
White34710
Montgomery34321
Lawrence32827
Wayne3179
Decatur31432
Harrison29422
Miami2582
Scott25010
Daviess24619
Greene23934
Franklin22410
DeKalb2224
Putnam2228
Jennings21012
Jasper2082
Gibson2004
Steuben2003
Ripley1887
Perry17212
Starke1657
Orange16424
Wabash1613
Posey1580
Fayette1557
Jefferson1492
Whitley1486
Fulton1462
Carroll1452
Wells1342
Knox1310
Huntington1183
Washington1161
Spencer1143
Newton11010
Tipton1075
Randolph1034
Clay975
Jay820
Adams812
Rush794
Owen781
Sullivan761
Pulaski721
Brown701
Fountain632
Benton600
Blackford532
Ohio514
Pike460
Parke451
Switzerland430
Crawford420
Martin420
Vermillion380
Union320
Warren191
Unassigned0200

Ohio Coronavirus Cases

Data is updated nightly.

Confirmed Cases: 93963

Reported Deaths: 3539
CountyConfirmedDeaths
Franklin17254514
Cuyahoga12753477
Hamilton9160248
Lucas4944318
Montgomery405778
Summit3294217
Marion288444
Butler271459
Mahoning2411253
Pickaway235742
Stark1690132
Lorain163476
Warren163435
Columbiana158260
Trumbull1433103
Fairfield125425
Delaware120618
Licking112543
Clark108613
Lake104336
Wood92458
Clermont85511
Medina83533
Miami76937
Tuscarawas74713
Portage71760
Allen65442
Greene62611
Belmont58926
Richland54012
Ashtabula53945
Mercer53513
Geauga53143
Erie52427
Wayne49958
Ross4014
Huron3764
Ottawa35925
Athens3451
Madison33310
Sandusky33217
Holmes3226
Darke32127
Hancock3202
Auglaize2225
Lawrence2200
Union2161
Jefferson2063
Washington19722
Putnam19217
Scioto1881
Coshocton1866
Muskingum1811
Knox1692
Crawford1685
Preble1662
Seneca1613
Shelby1604
Morrow1582
Hardin15012
Clinton1486
Fulton1401
Champaign1381
Ashland1333
Highland1321
Defiance1294
Williams1243
Logan1231
Wyandot1207
Brown1121
Guernsey1117
Hocking1119
Carroll1085
Henry1061
Perry1062
Fayette970
Monroe9118
Van Wert691
Jackson670
Pike660
Paulding610
Gallia581
Adams532
Vinton302
Meigs250
Harrison201
Morgan200
Noble170
Unassigned00
Fort Wayne
Overcast
64° wxIcon
Hi: 73° Lo: 52°
Feels Like: 64°
Angola
Overcast
59° wxIcon
Hi: 71° Lo: 51°
Feels Like: 59°
Huntington
Overcast
63° wxIcon
Hi: 71° Lo: 48°
Feels Like: 63°
Decatur
Overcast
64° wxIcon
Hi: 73° Lo: 50°
Feels Like: 64°
Van Wert
Overcast
64° wxIcon
Hi: 71° Lo: 50°
Feels Like: 64°
Cooler Tuesday
WFFT Radar
WFFT Temperatures
WFFT National

Community Events