Final answer:
Liners on hors d'oeuvre trays, such as decorative paper, serve aesthetic purposes as well as functional ones by absorbing excess moisture and making cleanup easier. These types of liners enhance the presentation of food while also protecting the serving tray. Materials like foam packaging peanuts are not suitable for food presentation.
Step-by-step explanation:
Common types of liners used on hors d'oeuvre trays are designed to enhance presentation and functionality. These liners might include decorative paper, such as doilies or custom-designed inserts, which serve both an aesthetic purpose as well as a practical one by absorbing excess oil or moisture from the hors d'oeuvres, thus maintaining their crispness and flavor. While materials like egg cartons and packing peanuts might be used in packing and transporting expandable foam products, or disposable cups, plates, and trays may serve a similar purpose for take-away containers, these are not typical for hors d'oeuvre trays in a catering or restaurant setting where presentation is key.
The primary purpose of these liners is to provide an attractive base that complements the visual appeal of the food while also protecting the tray and making cleanup easier. They may also act as insulation, keeping hot items warm or cold items chilled. However, they are different from materials like foam packaging peanuts or CD cases, which are used for protecting goods during shipping and are not suitable for direct food contact or presentation purposes.