A2A Spacer is a pocket sized valved holding chamber, collapsible for improved portability. A2A is made from anti-microbial, transparent plastic for improved hygiene. The inhaler spacer combines portability with a plume shaped chamber of 210ml, to minimise drug loss within the spacer. A2A Spacer has been designed with a visible valve movement to help parents or carers observe and confirm correct inhalation to overcome some inhalation/actuation problems.