The ornamental design for a champagneflute, as shown and described.
FIG. 1 is a front side elevational view of a champagne flute showing our
new design, the rear side and right and left sides being identical in
appearance therewith.
FIG. 2 is a top plan view thereof; and
FIG. 3 is a bottom plan view thereof.
The stippled shading on the stem of our new design for a champagne flute
represents a texture contrast.