The internet is full of videos like this showing water bottles for drinking used to supercool water. These bottles, not unexpectedly, appear a bit finicky, since they have lots of edges to serve as nucleation sites for ice crystals. What container would work best for this sort of demonstration?
Is the most important quality just to eliminate edges or does the material have an important effect? It's important in lab to add boiling stones as nucleation sites when boiling water in glassware. Could I use this trait for freezing too? Is the important quality of the glass the high surface energy or the smoothness of the surface? Alternatively, it seems like something like PTFE coating with super low surface energy might be effective?