Tiki mug
The wide ceramic mug tiki drinks are served in, sized for a genuinely large pour over crushed ice rather than the single measure a rocks glass holds. Shape varies wildly by design (a carved idol, a skull, a barrel), but the working capacity across the style is consistent, and it is the capacity a fit check cares about.

CC BY 2.0 · Cropped, white-balanced, graded and re-encoded to WebP by eXir.
An empty brown ceramic tiki mug carved with a stylised face, on a plain background
Capacity
Solid ice only, on the same tumbler ratios as the rocks glass family scaled to this capacity; a tiki mug is wide-bodied rather than tall and narrow, so it packs closer to a rocks glass than to a highball. Crushed is taken as 7% above cubed: loose crushed ice weighs about 593 to 640 kg per cubic metre against 917 for solid ice, roughly 65% solid, where loose cubes run about 61%.
Every drink below was checked against this figure at build time. A recipe that does not fit its stated vessel fails the build rather than shipping.