Unit dose dry powder inhaler with blister cavity including a bowl, channel and tube

A unit dose dispenser in the form of a blister containing a dry powder for inhalation, wherein the blister comprises:

• a base material in which a cavity is formed, wherein the cavity comprises a bowl that contains the powder and a channel that opens into the bowl;
• a lid material which seals the cavity;
• and
• at least one detachable portion which, when removed from the remainder of the blister, exposes an air inlet to the bowl and an air outlet from the bowl via the channel;
• wherein the channel contains a tube that has separate sections which provide the air outlet and the air inlet, and the air outlet is farther from the bowl than the air inlet, wherein the tube has a flat upper side which is level with a top of the channel and wherein the tube is divided longitudinally into a central air outlet section and two air inlet sections, one on either side of the central section, wherein the two air inlet sections comprise extensions that extend farther into the bowl than the central outlet section.