Answer:
I am merry creature in pleasant time of year as in but certain seasons I sing that you can hear; And yet I'm made a by-word A very perfect mock; Compared to foolish persons And silliest of all folk.
I am made by nature soft as silk; A puffy cloud white as milk; Snow tops this tropical crop; The dirtiest part of a mop.
I go in hard come out soft. Blow me hard and I’ll make a pop.
You can never eat me for breakfast or lunch. What am I?
You heard me before and then again. Afterward I die until you call me again.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.