An e-vapor device (60) includes a pre-vapor sector and a heater structure (114) arranged in thermal contact with the pre-vapor sector. The pre-vapor sector is configured to hold and dispense a pre-vapor formulation. The heater structure (114) includes a base wire (123) and a shell layer (119) coating the base wire (123). The base wire (123) is insulated from the shell layer (119). The shell layer (119) includes at least one recessed portion (122) between a first unrecessed portion (120a) and a second unrecessed portion (120b). The at least one recessed portion (122) is a thinner section of the shell layer (119) that is configured to vaporize the pre-vapor formulation to generate a vapor.
