Apologies for the vague question, but this is an “I don’t even know where to start” problem.
Anyone have general advice for how to model something like this?
I’m not that concerned with the overall form, but I am mystified on how to model the hole such that the cross sections are smooth and round (as opposed to just punching a cylinder through the form).
What I would try is start with a torus (donut) and use the cage edit command or simply activate the control points. Drag’n’scult however you like it, then trim with a planar surface to get the top part.
that method makes it difficult to control the circular cross section. Next try could be a trimmed torus and some curves
Trial2: (in case you wanna keep the circular form.
A Torus split by two lines coming out of the centroid and a pipe for the bottle’s throat.
Then using fillet.
… a mesh from 6 lines and a point (with the Fatten component) that gets turned into a SubD. You’ll need to scale and rotate the top edge manually… Carafe from lines.gh (21.1 KB)
-wim