alisanto effect
Named after it's 'discoverer', the Alisanto Effect is when you pour your first glass from a bottle, and then a second, noticing the first appeared to take more liquid out of the bottle.
Friend 1: What the hell? I poured the same amount for both!
Friend 2: Don't worry dude, it's the Alisanto Effect
Friend 2: Don't worry dude, it's the Alisanto Effect