BPelican 1200 Case wFoam (Silver) (Discontinued by Manufacturer) ReviewbP PP Pelican 1200 Case wFoam (Silver) (Discontinued by Manufacturer) PPelican cases are kept watertight through the use of a tongue and groove fit and a polymer o-ring.PPelican cases come standard with an Automatic Pressure Equalization Valve which releases built up air pressure while keeping water out.PPelican's Pick N'Pluck foam lets you customize the interior.