FIG. 1 is a front perspective view of a inhaler of our new design; FIG. 2 is a front elevational view of the inhaler of FIG. 1; FIG. 3 is a rear elevational view of the inhaler of FIG. 1; FIG. 4 is a left elevational view of the inhaler of FIG. 1; FIG. 5 is a right elevational view of the inhaler of FIG. 1; FIG. 6 is top plan view of the inhaler of FIG. 1; and, FIG. 7 is a bottom plan view of the inhaler of FIG. 1.