Dilution is the question I get most after cloudiness, usually in the form of a vendor pitch: "our large-format cube is the same as a sphere, the weight matches." So let me answer that one first.
Weight is not the variable that matters. Surface area is. For a given volume, a sphere presents the smallest possible surface area to the liquid. A standard cube has eight corners and twelve sharp edges, and corners have the highest ratio of surface to volume, so when spirit hits them, they melt first and fast. Same weight, different first minute. Size helps; geometry does the rest.
I will not promise that switching shape alone adds points to your margin: I do not have a controlled study isolating surface area from every other variable on a real floor, and if you need a vendor to sell shape as magic, we are not your supplier. Your bar team already feels it, even without a number: drinks that stay cold longer without turning watery, and fewer remakes coming back.
Chilling always means melting
Ice cannot cool a drink without melting. That's just basic thermodynamics. The only questions are when the water arrives and how aggressively. With sharp-cornered ice you get an early burst: the drink "opens up" before the guest's first conversation is over, then keeps thinning past spec. With rounded ice shapes, heat transfer spreads across a smooth curve: the drink cools without the shock dilution that flattens aroma in the first sixty seconds.
Your floor notices this as stickiness of spec: a Negroni that still reads bitter-sweet at the last sip; a neat pour that has not gone watery while the guest talked for twenty minutes; a stirred drink that needs no compensating, no pouring colder or stirring longer to outrun the melt.
The cracked cube myth
That audible crack when spirit hits ice is thermal shock finding weak points. Deep-frozen ice with internal fractures behaves worse under the pour even when it looks clear at the edges. Tempering helps (we publish guidance on the Trade page), but geometry helps more, because curves distribute the stress that corners concentrate.
The better question for your current supplier: why does their ice need so much handling before it is safe to pour?
Why our formats look the way they do
The 60mm sphere is the generalist: coupes, double rocks. The chamfered cylinder exists because rocks glasses are flat-bottomed and a cylinder with bevelled edges removes the harsh corners from that format without rolling around. Both are melt profiles you can plan a menu around.
Aurasphere is not selling a physics course. We sell ice that behaves predictably on a high-end floor, and predictable melt is the bridge between what your bar team feels and what your finance team asks about pour costs. When melt is predictable, remakes tend to drop. I will not put a number on that until we have the data to back it.