use gradient tool then add filter>add noise,3,(gaussian).
then duplicate this layer..use prespective...to trasformit then...use blur>gussian blur.give inner shadow.
step 2 of 5
insert image source1 then use image levels...maximum dark...then use color dodge and opacity(45%).
insert image of glass then use layer styles...after that use main image use prepective transform tool to adjust it cut its grass part and fill with color look like beer effect...then overlay it ...