Liu Qian's magic of sucking coke through a straw is obviously a fool. When he took the cup away, a small hole appeared on the tray below. You can take a closer look. There must be. "

The straw for sucking coffee is transparent, and you can see that the liquid is sucked up.

But anyone who has drunk water through a straw knows that if you stick your tongue to the hole of the straw and suck the water into the straw, you can't drink water and the liquid stays still.

Theoretically, just a little coffee, hold it in your hand with a small container, suck a little with a straw and suck off the bubbles, and the coffee will not move.

Take your tongue off, the liquid will return to the container, and the coffee in the cup can be put on the other side.