Fig. 1: Annotated ICF-1 test vessel.
From: The draining of capillary liquids from containers with interior corners aboard the ISS

Slender truncated 75-30-75 isosceles triangle-based pyramid with 3.155∘ taper. a Camera view of apparatus with valves V1 and V2 labeled, b solid model, c tapered test chamber wire model with dimensions in cm, where large-end (bottom) to small-end (top) cross-sectional isosceles triangles are congruent through a 20:13 ratio, and d cropped image of test chamber single drain operation aboard ISS. In addition to a superposition of the relevant coordinate system, d provides a bold blue arrow indicating drain direction at flow rate Q(t).