Do Styrofoam cups sweat?

Online Answer
Plastic foam, also known as polystyrene, doesn't biodegrade like paper and isn't as easily recyclable as other plastics, but it's still used widely in the food service industry because it's inexpensive and preferred by some customers because it keeps beverages cold longer and doesn't "sweat," or produce condensation on ...
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Products derived from plastics, and those especially from oil, tend to be seen as environmentally unfriendly. Polystyrene is also slow to biodegrade which adds to its poor reputation among environmentalists..
Polystyrene is highly flammable and ignites at relatively low temperatures. It has been linked with huge fires, often in commercial buildings and warehouses, where its use is more common.