How can you make a cup stick to your mouth...explain how this works.?

please explain how pressure has to do with this also....How can you make a cup stick to your mouth...explain how this works.?
1. Place the rim of the vessel firmly against the edge of your mouth, making sure to create a seal around the complete circumference of the glass.





2. Hold your nose and inhale slightly to create a vacuum.





3. Release the glass by equalising pressure. In other words, breath out. Be prepared to catch the glass.





The reason it sticks to your face is that a vacuum creates a difference in pressure between the inside and outside of a contained area. Since that pressure wants to get in, all force around it is pressing against every edge of the the contained area. This includes your head and the glass.How can you make a cup stick to your mouth...explain how this works.?
This is a really interesting question, Cups stick to your mouth by sucking in the air, When the air goes, It pushes the cup to your mouth, I learned this in science class. It's way more simple than you'd think it would be.
by sucking a little air out of the cup, you are creating a partial vacuum. The air pressure inside the cup is slightly lower than the air pressure outside the cup, and air pressure in any atmospheric system seeks to equalize. Air pressure outside the cup is pressing the rim of the cup into your face.
I agree when you inhale with a cop on your mouth you not only look funny with the ring on your face lol but you also have to understand that it's like anything out there that sucks stuff into it. once the air is pulled you have that suction I don't know how it can be any clear how it works
When you suck inward, it creates a vacuum, making it stick.
you place the cup around your mouth and suck! not sure how it works but it does! ENJOY
If u suck all the air out, the inside of the cup becomes like a vacuum.
just stick it over ur lips and suck in....it stays...idk y tho
Physics.
suction
Your kidding right?
Simply, when you suck in the air that is in the cup into your mouth and lungs, the air pressure outside the cup is then greater, and thus it pushes the cup toward the low pressure area, which is your mouth.
u push air outta the cup, and now its trying to get back in, which pushes the cup holding it to your mouth

hair tips