Alright, I’m going to go ahead and admit it: I had no idea how to effectively pour juice.
I’ve probably done it the wrong way since forever. I feel silly now. Thankfully, a crazy Russian hacker has set me straight. No really, that’s his name.
Over the very popular YouTube channel Crazy Russian Hacker, the host shows us lifehacks that are so simple you’d smack yourself for not thinking of them. You’ve been taking your shirt off wrong. You’ve been wrapping your computer charger wrong. And he says that you’ve been pouring juice wrong your whole life. Darnit. He’s right.
Why do cartons of juice glug glug glug in the first place? When the juice is first sealed for sale, the contents inside are at the same pressure as the outside — atmospheric pressure. When you pour the juice out the “wrong way,” the weight of the liquid forces it out of the carton. But when the volume of liquid in the carton decreases, the air bubble in the carton increases. When you increase the volume of a gas without adding any mass, its pressure decreases. Once the inside of the carton is at a lower pressure than atmospheric, the outside has the air pressure to push past some juice and equalize everything — glug, glug. This process repeats itself until the carton is empty.
The “right way” to pour from the carton gets around the problem of pressures. By leaving a section of the pouring hole unblocked, air is free to rush in and equalize, making for a perfect pour. (The same technique applies to motor oil and other similarly shaped containers — that’s why they re shaped that way!)
You can watch the full video below:
I can’t believe I never tried this. (╯°□°）╯︵ ┻━┻