Beer is a popular drink among many, especially in the drinking culture of Vietnam. However, not everyone knows the easy way to pop open a beer without a bottle opener.
In fact, when you don’t have a bottle opener, you can use a spoon, chopsticks, or even another beer bottle to open it.

Insider Tip: Target the Small Point on the Cap for an Easy Open, No Tools Required
Opening Beer Without a Bottle Opener
There’s actually a simple “trick” to it. It lies in the cap of the beer bottle.
The sealed bottle creates a pressure difference between the inside and outside, making it challenging to open. Similar to when people open a box, some might tap the bottom of the bottle to instantly release the air at the bottom to the top, and the pressure difference will cause the cap to move. This method can also be applied to beer bottles, but instead of tapping the bottom of the bottle directly, gently tap the side as the long bottle won’t achieve the desired effect of a can.
The ring pull on the bottle cap creates a tight seal. So, by applying heat to the mouth of the bottle with a lighter for a few seconds, you allow a small amount of air to enter the bottle, and with a gentle twist, the cap will come off.
The Secret to Beer Bottle Caps and the Special Point That Makes It Easy for Anyone to Open
Even though the cap is a tiny part, manufacturers optimize its design for ease of use. The number of serrations was adjusted to 21 after numerous experiments (initially 24). Being a multiple of three provides more stable support than two or four points due to the circular shape of the bottle mouth. The 21 serrations meet two basic requirements: a tight seal and secure fastening.
The wavy design with 21 serrations also ensures safety, especially for carbonated drinks like beer and soda. It reduces friction and makes it easier to open the cap. So, when using any tool to open the bottle, place it at the wavy point of the cap, and it will pop open in an instant.
Opening a Bottle Cap by Tapping It on the Edge of a Table
If you don’t have a bottle opener, you might consider knocking the mouth of the bottle directly on the corner of a table. While the principle is similar, this method can cause the bottle mouth to break and damage the table. Therefore, it’s better to refrain from using this approach.
In other words, it’s about using counterforce. You can make the mouths of two beer bottles touch directly. This method is quite simple: place the edge of one bottle cap on top of the other to create an up-and-down state, then gently knock them down together. It requires a bit of force but is relatively safe. Just make sure to hold the bottles firmly.

Insider Tip: Target the Small Point on the Cap for an Easy Open, No Tools Required
Finally, while beer is an alcoholic beverage, it’s important to enjoy it in moderation, especially during parties or recreational activities.