Liquor goes fast in hot weather.
[He holds the bottle to the light to observe its depletion.]
– Tennessee Williams
A Streetcar Named Desire, Scene 1. Stanley uses verbal irony to let Blanche know where his liquor has been disappearing to. Sarcastically suggesting that the hot weather is to blame, he knows that it’s not and Blanche has been helping herself to the liquor. The motif of light is used here, to reinforce Stanley’s warning that he sees through Blanche and is not fooled by her.