Answer:
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
When liquid splashes me, none seeps through. When I am moved a lot, liquid I spew. When I am hit, color I change. And color, I come in quite a range. What I cover is very complex, and I am very easy to flex.
What two things can always see what the other sees, but can never see each other?
What can be heard and caught but never seen?
A hill full, a hole full; yet you cannot catch a bowl full. What is it?
What language does a billboard speak?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?