I think it's called ribbon ice. I've always thought it would be cool to have containers that are designed to extrude it so that before a storm comes you could

I think it's called ribbon ice. I've always thought it would be cool to have containers that are designed to extrude it so that before a storm comes you could fill them with water and have a transient art thing happen. I think that the temperature requirements are rather specific, so you might also need some kind of temperature control widget to make it happen more reliably.