The ceramic cup is most suitable for hot beverages because polystyrene cups might melt when exposed to high temperatures, posing safety risks.
On the other hand, stainless steel cups tend to conduct heat efficiently, causing their surfaces to become very hot and uncomfortable to hold.
Ceramic cups, however, provide good thermal insulation and remain relatively cool to the touch, making them safer and more comfortable for drinking hot liquids.
Additionally, ceramic is durable, non-reactive, and retains heat well, preserving the beverage's temperature longer.