Take a sheet of A4 paper and fold it repeatedly until it becomes thick and firm. Hold the can securely with one hand, and with the other, rub the folded paper's corner vigorously and continuously against the tab's opening point.

In tests, those with strong hands only needed to rub for a little over 10 times for the can to open. Women and children took a little over 10 seconds.

Rubbing the paper against the can's weakest point. Photo: Aboluowang

Rubbing the paper against the can's weakest point. Photo: Aboluowang

Behind this trick lies an interesting principle. Beverage cans are primarily made of aluminum, a relatively soft metal. The friction generates heat, softening the aluminum and warming the CO2 inside, increasing the pressure. This pressure differential forces the tab open.

For cans of milk, bird's nest soup, porridge, or non-carbonated drinks, even without the assistance of CO2, persistent rubbing at the tab's weakest point will eventually cause the metal to crack and open.

This tip isn't just useful for broken tabs; it's also handy for drinking with a straw. After opening the can, insert the straw through the tab's hole, adjust its position, and rotate the tab backward. This simple action secures the straw, enhancing the drinking experience.

Bao Nhien (Aboluowang)