What is the use of the "round hole" in the coffee bean bags? Insider answer
The busy lifestyle makes many modern people refresh themselves with a cup of coffee before going to work, and some even purchase a coffee machine and grind coffee beans to brew them by themselves. However, some netizens suddenly wondered, "What is the purpose of the round hole on the coffee bean packaging?" Immediately, an expert pointed out the purpose: "Nothing will happen."
A netizen asked a question on Facebook "Costco Product Experience Honestly", because I recently purchased coffee beans from a well-known brand, and suddenly noticed a "mysterious round hole" above the bag after soaking, and I couldn't help but wonder about this inside the package. What does the device do?
Some insiders have supplemented relevant knowledge in detail. The purpose of the hole is "coffee beans will produce carbon dioxide and exhaust it."
After the post was exposed, many netizens responded with their daily experience, "I will squeeze out the breath of a brand I haven't bought and smell it to see if I like it before buying it", "Press the smell and smell the bean fragrance", "Exhaust, it will become addictive after smelling it for a long time", "one-way exhaust hole".
There are also experts who have supplemented relevant knowledge in detail, "Let the air in the bag only go out and not in, slow down the aging of coffee beans", "One-way valve, the gas can only go out but not in, the coffee beans will produce carbon dioxide, which is used for exhausting", " If you don't have this, the bag will burst open", "The coffee bean seller will discuss that customers go to squeeze the air to get out, and you will run away once you squeeze the flavor."