Milkshake straws are larger in diameter than soft drink straws. Since milkshakes are thick, they are very hard to drink with a small straw, thus the increased diameter of the straw makes it easier to drink.
Atmospheric pressure
When you suck on a straw, you decrease the air pressure inside the straw, creating a partial vacuum. The higher air pressure on the surface of the liquid outside the straw then pushes the liquid up the straw and into your mouth.
The straw used to drink yerba mate is called a bombilla. It serves as a filter to help keep the chunky bits from entering the straw.
straw
an element used to make soft-drink cans is aluminum
The metal aluminum is the primary element used to make soft drink cans.
because of density and the fact that the bicarbonate is bubbling.-mostly when you shake or refill it
The metal aluminum is the primary element used to make soft drink cans.
As you suck on the straw air is removed from the inside of the straw and the air pressure within the straw is reduced. Once the straw's air pressure is reduced past atmospheric pressure of about 760 mmHg, the Patm forces the drink up the straw and into the sucker's mouth. Gases move from high to low pressure areas until equilibrium is reached.
I personally think you drink more when using a straw. I drink twice as much with a straw than tipping the cup.
The end of a straw wrapper that a waiter leaves on your straw is called a "flag." It helps to indicate that the straw is clean and has not been used by anyone else.