What is that 600 gallon preformed made of? I didn't know that you could get
one that big for $ 100--

I'm not exactly sure....Sam's Club has it for $104. I'm heading up there now
to look at it and try to get more info. Someone is getting this for me as a
gift, but if it's more hassle than it's worth, I may just can the idea.

The liner available for the same price is pvc, .02" (not sure of the mm), and
is blue. Anyone heard of this stuff?

Thanks for all the replies!!