\pgfplotsset{
    colormap={whitered}{
        color(0cm)=(white);
        color(1cm)=(orange!75!red)
    }
    %colormap={color}{color(0cm)=(white); color(1cm)=(blue)}
}
\begin{tikzpicture}
 \begin{axis}[view={60}{30}]
  \addplot3[surf,
  samples=50,
  domain=1:2,y domain=0:2*pi,
  z buffer=sort]
  %({(2 + tan(deg(y)))*cos((deg(x)))}, {(2 + cos(x)) * sin(x)}, {x});
  ({x * cos(deg(y))}, {x * sin(deg(y))}, {1/x});
 \end{axis}
\end{tikzpicture}
