Hippo is dead or should be. There are a couple of threads about people who got riped off by them. http://www.letsgoride.com/index.html
They used to have a phone number but it's not on the web site anymore! I'll look for it.
This is a pic of the ski locker sac full (~750 lbs). The sac is 75" long when full. If I had put a fat sac in the locker, I estimated I would have only got about 350 lbs into it! One point though. Be very careful about filling any ski locker sac...you could damage your boat.