This is the hardest shape in the catalogue to manufacture. Every flat plane and sharp shoulder on the Isis had to hold its geometry through a ten percent shrink in the kiln — curves forgive that, right angles don't. The result is close to a cube: flat-faced cistern, squared bowl, square seat, and a fully skirted body that conceals the trapway behind one clean vertical wall. Nothing protrudes. Nothing catches dust. One wipe, edge to edge. Underneath, a washdown pan clears by gravity and water volume rather than siphon suction — dependable on the modest pressure of tank-fed supply. Vitreous china, glazed white and non-porous. P-trap outlet for wall-level waste. Close-coupled, dual-flush. Complete suite. Architectural, and priced like a toilet.