Why is a liquid measure see through and glass or heat resistant plastic?

ANSWER:

A liquid measure is seen through and glass or plastic material so that the measures can be read easily and with accuracy.

EXPLANATION:

It is easy to read measurements from outside of the cups when they are made of clear plastic or glass. These measuring cups are made from heat resistant plastic or glass so that these can be used to measure hot liquids as well. Heat resistivity does not allow heat to pass through the cups and anyone holding the cup does not feel the heat. Also when hot liquids are measured, the heat does not break the glass if it is heat resistant.

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