  A $3$-Prismatoid is the convex hull of two convex polygons $A$ and $B$ which
lie in parallel planes $H_A, H_B\subset\mathbb{R}^3$. Let $A'$ be the
orthogonal projection of $A$ onto $H_B$. A prismatoid is called nested if $A'$
is properly contained in $B$, or vice versa. We show that every nested
prismatoid has an edge-unfolding to a non-overlapping polygon in the plane.
