Base for Composition Warmer Assembly

FIG. 1 is a perspective view of showing the new design for a base for composition warmer assembly. FIG. 2 is a side view thereof; FIG. 3 is a front view thereof; FIG. 4 is a top view thereof; FIG. 5 is a bottom view thereof; FIG. 6 is a rear view thereof; and, FIG. 7 is a side view thereof. The broken lines in the figures show portions of the base for composition warmer assembly that form no part of the claimed design.