Us &ndash crown prince seafood,city of industry,calif., switches from a 6ounce, twopiece aluminum can with a standard end to a 5ounce, twopiece aluminum can with an easyopen end. The smaller, easyopen can provides a container with a lining free of bisphenol a bpa, a controversial chemical commonly used in can linings. The bpafree can, supplied by impress,deventer, the netherlands, the world&rsquos largest supplier of seafood cans, is used for crown prince natural brand wildcaught yellowfin, albacore and tongol tuna. Updated paper labels announce bpa free.