Here is my personal approach to faking chromatic dispersion with cycles Refraction and Glossy BSDF. I used absorption nodegroup by BlenderDiplom from this tutorial https://www.youtube.com/watch?v=qkqsx951gcg and combined it with a simple idea of using Fresnel node as a factor for alternating the hue of glass tint. It is not perfect, it’s rather a test project and needs many corrections and adjustments, but i believe that tweakin a few value will give you a nice and cheap effect.
Here the diffence is even smaller, but fake dispersion gives some additional tint in the bottom of the glass, and gives a slightly “rainbow” effect on the lug.
I hope noone will accuse me for promoting alcoholism, because the next subject is a whisky glass. It has a nice complex shape with both smooth and sharp transitions.
without FD
And finally our favorite Susanne. I guess i don’t have to mark which one is made of clear glass and which has some extra nodes for the material tint added. Although in case we work with a bigger concrete piece of glass i.e. ball or monkeys head this material node gives rather a soap bubble effect.