Answer:
Virgin olive oil
Explanation:
The measurement of items using various methods depends on the content and the state of the material or product been measured. it is necessary to measure a liquid substance using the transparent cup so as to see if there are any residue from the measured substance.
other forms of substances can be measured using either a transparent measuring instrument or a non-transparent measuring instrument/equipment. the salt and pepper can be stored in transparent container if the container is not labelled as well .
