After we create several objects using bevel, screw, and spin tool, now we will add a glass material on one of the object we made. Open your glass object file or if don’t have one, just use blender monkey default object for this practice purpose.
On material editor, click New button and set the Specular : Hardness = 150, check Transparency box ( Raytrace ), Alpha: 0, and IOR: 1.150. Or you can just see from this picture:
