A cap, apparatus, and method for manufacturing a cap. The cap (104) may include a base (106) defining an orifice therethrough, and a lid ((108) coupled with the base. The lid may include a top surface (125), a bottom surface (134) that is opposite to the top surface, a plug (122) extending from the bottom surface for a first distance, and a brim (114) extending from bottom surface for a second distance that is less than or equal to the first distance. The brim includes a first curve (208) at least partially extending from the bottom surface away from the top surface, and a second curve (210) at least partially extending from the top surface, away from the bottom surface. The brim defines at least a portion of an engagement surface that faces at least partially away from a centerline of the lid. The cap is operable between an open position and a closed position.