The ornamental design for a mixingbowl with a multi-purpose base, as shown and described.
FIG. 1 is a perspective view of the mixing bowl with a multi-purpose base;
FIG. 2 is a front elevation view of the mixing bowl with a multi-purpose base;
FIG. 3 is a side elevation view of the mixing bowl with a multi-purpose base;
FIG. 4 is a top plan view of the mixing bowl with a multi-purpose base;
FIG. 5 is a bottom plan view of the mixing bowl with a multi-purpose base; and,
FIG. 6 is a perspective view of the mixing bowl with a multi-purpose base shown in one example use.
The broken lines shown in the drawings are for the purpose of illustrating environmental matter and portions of the article that form no part of the claimed design.