FIG. 1 is a perspective view of an insulating sleeve for a beverage container showing our new design;
  
    FIG. 2 is a front elevation view thereof;
  
    FIG. 3 is a back elevation view thereof;
  
    FIG. 4 is a right side elevation view thereof.
  
    FIG. 5 is a left side elevation view thereof.
  
    FIG. 6 is a top plan view thereof; and,
  
    FIG. 7 is a bottom plan view thereof.
  The broken lines in the figures are directed to environment forming no part of the claimed design or show portions of the insulating sleeve for a beverage container that form no part of the claimed design.
  The shade lines in the figures show contour and do not claim surface ornamentation or treatment.