In a large pot, pour in enough water to cover the shrimp by two inches, squeeze in lemon juice, then add the lemon rinds, shrimp/crab boil seasonings, and apple cider vinegar, and bring it to a boil. Add the shrimp, allow the water to return to a boil, remove the shrimp when they're pink and opaque, drain the water, and cover the shrimps with ice.