The Staub Cast Iron Mussel Pot ("Mouliure") is a specialized, oval cast iron pot designed for cooking and serving mussels, featuring a unique design with a built-in stainless steel strainer to hold mussels while pouring off the broth, and a lid that doubles as a shell discarder, offering excellent heat retention for even cooking and serving on all stovetops, including induction. 
 
Black Cast Iron Mussel Pot from Staub Specialities. Holds 2-3 servings of mussels. A grill bisects a small area into which you can add spices and liquids.
 
Heat resistant to 260C and cold resistant to -20C.