The shape alone is for some reason hard for me to visualize and I also need to find the volume of the following shape called S

The base of S is the triangular region on a graph with vertices (0,0), (1,0), and (0,1). Cross sections perpendicular to the y axis are equilateral triangles.

The best thing I can come up with is some kid of skewed pyramid, and I'm clueless on the volume.