Plastic is used for many things in modern homes. One reason it is used so often is that it has many different forms. Plastic can be flexible or firm, clear or opaque and colored and shaped to take on various appearances.
Plastic tends not to be harmed by liquids. So, it is often used for objects that will be exposed to the weather. Plastic is not generally harmed by cold; although hard plastics may become brittle. Heat will melt plastic. Some plastics melt at relatively low temperatures.
- Wikipedia's article on plastic