Answer: ware, glass, clay, silver, silverware
Explanation:
Five materials that are used in the production of kitchen utensils are ware, glass, clay, plastic, and iron.
Since they are in the kitchen they have to be always clean and ready to use.
Different types of material are used because of the different temperatures used for cooking, varnishing, enameling, and more. It is important that kitchen utensils do not react with the food or some chemical for cleaning.
Question's pretty vague, although I recommend a name that's brief and easily recognizable as well as something that relates to the purpose. So if someone sees it, they can easily remember and identify what it is exactly.