One container 900 is used to using a transducer unit include the coupling medium for being used for the transdermal delivery of a medicament, the energy converter 108 with output face 110. Container 900 includes room 914, is used to receive a coupling medium and a contact surface 212, for contacting energy converter output face 110. Container 900 can be attached to transducer unit and form acoustical coupling according to attachment between the energy converter output face 110 and contact surface 212 for ultrasound emission. Additive vessel 900 to energy converter 108 can form airfree coupling between energy converter output face 110 and contact surface 212, and wherein contact surface 212, which can be deformable to, meets energy converter output face 110. Contact surface 212 may include the contact facial mask first is that the impedance matching of coupling medium. Container 900 may include for keep being used for transmission coupling medium to room 914 coupling medium and a transfer means 956 room 914 other than a reservoir 950, wherein transfer means 956 may include the piston being arranged in reservoir, and wherein container 900 or transducer unit may include skin contact detection means. One medicament delivery device of the same open transdermal delivery for a medicament.
