Answer:
Mouth up it gets filled, mouth down it gets empty.
I cannot be felt, seen or touched; Yet I can be found in everybody; My existence is always in debate; Yet there is a style of music named after me.
One am I, among six others: Largest, smallest, cold, dark and two brothers
If someone calls you this, it might be time to consider hot wax
An image taken from real life
What is always coming but never arrives?