Plastic bed liner re-use ideas

I have access to take out plastic bed liner. At work we lease to a spray in bed liner guy who pulls them out of new trucks. Anyone have any re-use ideas for these?

Toboggans.  Those things are so slippery, they should slide down hills at a furious pace.

I had one at the farm I put a rope through the end for moving grass, branches, leaves around when cleaning. They slide really well and hold more than a regular wheelbarrow. 

Pond liner, firewood stack roof, shed roof, liner for a utility trailer (contain dirt and rocks), water proof top for a utility trailer.

Underbody aero.

Streetwiseguy said:

Toboggans.  Those things are so slippery, they should slide down hills at a furious pace.

I was thinking of a terraced water slide, not that I'd want to be the one to try it. 

Homeless shelters?

Liner for a small garden to keep out tunneling pests.

Appleseed said:

Underbody aero.

The True Hero this thread deserves.

...A Brooch Or A Pterodactyl

Partner up with landscape supply company to use them for deliveries. 

Charge a fee+deposit, dump the mulch (or whatever) in the liner, collect when empty, return deposit, repeat. 

Customer can dump materials on lawn, driveway, etc, without damage or loss of material.