I used the tote frames and cut the tops off of the bladders. What's left is the bottom of the bladders and the valves. There are many uses for these... Raised Beds/Wicking Beds, Miniature Greenhouse/Cold Frame, Livestock Feeder/Hay Storage, HDPE plastic for projects, Duck Pond, Chicken Brooder/Coop, use your imagination.
I have 6 of them.
Roughly 48"L x 40"W x 40H"
(they are upside down in the pics)