this feels like it would’ve been an exchange between Fry and Bender
I love this Curb episode
I interpret it as “who is the arrow pointing at?” between the image and the prof.
Stones are less effective overall because they don’t melt. A very substantial part of the temperature change you get from putting ice in something is actually from thermal energy in the liquid going towards breaking the bonds between molecules that comprise solid ice in order to make it water. Without that sink for heat, you’ll still cool your drink by allowing the colder solid to absorb heat from the liquid, but the temperature change will not be nearly as much.
I feel like TNG season 5 is just classic episode after classic episode