An inhaler article (10; 10') comprising: an inhaler body comprising a tubular side wall defining an interior and a longitudinal center axis, the interior forming a receptacle for housing an inhalable powder; a mouthpiece element (200; 300) extending along the longitudinal center axis from a distal end (202; 302) to a proximal end (201; 301), the distal end of the mouthpiece element being received in the interior of the inhaler body, the mouthpiece element comprising: a tube (240; 340) extending coaxially with the inhaler body and comprising an interior surface (241; 345) having a first diameter (D241; D345); a blocker (230; 330) disposed at the distal end of the mouthpiece element, coaxial with the tube and having a second diameter (D230; D330) that is greater than the first diameter, the blocker being arranged to block airflow through a center of the mouthpiece element at the distal end; a collector surface (250; 350) comprising a ring that is coaxial with and disposed proximally of the blocker, the ring defining an inner diameter (D251; D351) and an outer diameter; and an airflow channel (220; 320) extending through the mouthpiece element and comprising an off-set portion (221; 321) arranged around the blocker, a discharge portion (223; 323) extending to an outlet (211; 311) at the proximal end, and an intermediate portion (222; 322) connecting the off-set portion and the discharge portion. an inhaler body comprising a tubular side wall defining an interior and a longitudinal center axis, the interior forming a receptacle for housing an inhalable powder; a mouthpiece element (200; 300) extending along the longitudinal center axis from a distal end (202; 302) to a proximal end (201; 301), the distal end of the mouthpiece element being received in the interior of the inhaler body, the mouthpiece element comprising: a tube (240; 340) extending coaxially with the inhaler body and comprising an interior surface (241; 345) having a first diameter (D241; D345); a blocker (230; 330) disposed at the distal end of the mouthpiece element, coaxial with the tube and having a second diameter (D230; D330) that is greater than the first diameter, the blocker being arranged to block airflow through a center of the mouthpiece element at the distal end; a collector surface (250; 350) comprising a ring that is coaxial with and disposed proximally of the blocker, the ring defining an inner diameter (D251; D351) and an outer diameter; and an airflow channel (220; 320) extending through the mouthpiece element and comprising an off-set portion (221; 321) arranged around the blocker, a discharge portion (223; 323) extending to an outlet (211; 311) at the proximal end, and an intermediate portion (222; 322) connecting the off-set portion and the discharge portion. a tube (240; 340) extending coaxially with the inhaler body and comprising an interior surface (241; 345) having a first diameter (D241; D345); a blocker (230; 330) disposed at the distal end of the mouthpiece element, coaxial with the tube and having a second diameter (D230; D330) that is greater than the first diameter, the blocker being arranged to block airflow through a center of the mouthpiece element at the distal end; a collector surface (250; 350) comprising a ring that is coaxial with and disposed proximally of the blocker, the ring defining an inner diameter (D251; D351) and an outer diameter; and an airflow channel (220; 320) extending through the mouthpiece element and comprising an off-set portion (221; 321) arranged around the blocker, a discharge portion (223; 323) extending to an outlet (211; 311) at the proximal end, and an intermediate portion (222; 322) connecting the off-set portion and the discharge portion.