Snapcage/snapcage bunkers

[Backmanshooter]

I was thinking of getting one to throw in the backyard just to have to use with a few friends.
Snapcage
http://www.snapcage.com/products.php?id=5
Bunkers
http://www.snapcage.com/products.php?id=1

The bunkers dont look very strong for a paintball impact, but I could be wrong. I was wodnering if anyone who used/owned these to give me information and your thoughts about it.

Thanks.

-Backmanshooter