What drink is the opposite of Aww Short?

I am basically a fancy hat, with a much larger ego.

I bring joy to children, until someone discovers just how loud I can be.

How much is that doggie in the…? Wait. Where is the doggie? Remember when you had to roll them up or down in the car? The first four of my letters describe something I protect you from. I am literally needed when one defenestrates. What am I?

To swallow this volume will cause you to choke. Putting this unit down your throat is no joke.