The Ty-D-Bol v1.2
A giant toilet that you can swim around in and even go into the tank. The Flush handle is also a rocket sniper ledge, and has a switch to flush the toilet.
V1.1 More guns/ammo and you can get out of the water at all times.
V1.2 Textured the side of that platform.
Levels in map "The Ty-D-Bol":