because it does
A 'snug fit' polystyrene holder.
polystyrene
well a polystyrene cup conducts heat so that is how it keeps your drink warm
Polystyrene is a plastic. I think you meant "polystyrene foam", which would be correct.
yes polystyrene is ls less dence than water because it floats
You can keep it warm by keeping it out in the sun. If there is no sun, than I don't know how it will it will stay warm.
Warm air and warm water. Cold air and cold water keep ice cooler longer.
they help them to keep warm in the water.
Cotton when wet exhibits a capillary effect and wicks much water into its volume. It does not keep you warm.
Hurricanes needs warm water below them to keep their strength. Moist warm air rising from the sea is what builds hurricanes.
It brings warm water, which heats the overlying air.