The ornamental design for a beveragetopper, as shown and described.
FIG. 1 is a perspective elevational view of the beverage topper of the present invention containing ornamental objects and snowflake particles in suspension in a liquid, with the topper shown in relation to a beverage container within which the topper is to be inserted; and,
FIG. 2 is another perspective elevational view of the beverage topper of FIG. 1 after being shaken with the snowflake particles shown distributed throughout the liquid suspension medium.
The broken lines in the drawings depict environmental subject matter only and form no part of the claimed design.