If glassware and ceramic mugs are boarded on the aircraft, they are meant for which service?

The inclusion of glassware and ceramic mugs on an aircraft is associated with the premium service provided to passengers in First Class. This level of service emphasizes a more luxurious and polished dining experience, which often includes the use of higher-quality materials for beverages. Glasses and ceramic mugs not only enhance the presentation of drinks but also suggest a commitment to an upscale atmosphere that is typical of First Class offerings.

In contrast, Economy Class and often Business Class services typically utilize plastic or disposable cup materials that are practical for handling and cleanup but do not provide the same level of elegance and refinement expected in First Class. Therefore, the use of glassware and ceramic mugs is specifically aligned with the expectations and services provided to First Class passengers, making it the correct choice for this question.