Answer:
You throw me out when you want to use me and you take me in when you don't want to use me. Who am I?
Round like a dishpan and smaller than a bathtub. But the ocean can't fill it. What is it?
Come up and let us go. Go down and here we stay.
My first is a creature whose breeding is unclear. My second, a price you must pay. My whole can be found in the river of Time and refers to events of today.
An open ended barrel, it is shaped like a hive. It is filled with the flesh, and the flesh is alive!
It is something you make after you've weighed your options.