\begin{tikzpicture}[scale=\textwidth/5cm,samples=200] \begin{axis}[ hide axis, view = {40}{40} ] \addplot3 [ surf, colormap/cool, shader = faceted interp, point meta = x, samples = 40, samples y = 5, z buffer = sort, domain = 0:360, y domain =-0.5:0.5 ] ( {(1+0.5*y*cos(x/2)))*cos(x)}, {(1+0.5*y*cos(x/2)))*sin(x)}, {0.5*y*sin(x/2)} ); \addplot3 [ samples=50, domain=-145:180, samples y=0, thick, color = red ] ( {cos(x)}, {sin(x)}, {0} ); \end{axis} \draw (3,0) node {$M = S^1 \rtimes B^0$}; \end{tikzpicture}