Answer:
My first half means container. Not a lot of people understand my language.
As a state in the USA, I am round on both sides and high in the middle. What am I?
Crooked as a rainbow and slick as a plate, ten thousand horses can't pull me straight. What am I?
I am a pretty one, fluttering in the pale blue sky. Delicate, fragile on the wing, indeed I am a pretty thing. What am I?
I have no life but I can die. What am I?
If I say "everything I tell you is a lie", am I telling you the truth or a lie?