Answer:
Good memory, skin like the sea. A great beast I am, yet vermin frightens me. What am I?
I am a band that does not perform sing or act.
There is one in every corner and two in every room.
I'm written with two letters, said with one and seen with two. What am I?
You throw me out when you use me and take me in when you are done. What am I?
Give it food and it will live, give it water and it will die.