Select this auto shape.
Draw the shape as shown :
Now apply these layer styles in it :
Again, select the next autoshape as shown :
Set the foreground color to white and draw the shape above the black ring which we created using layer styles (more specific : with satin layer style)
Rasterize the layer. Use high feathered eraser and erase most of the part, leaving the part as shown. Gel filled ring is ready :)
