What should flight attendants do if they discover airline-specific supplies for another airline on board?

In this scenario, the appropriate action for flight attendants discovering airline-specific supplies for another airline on board is to utilize supplies from the Generic Service Kit. This kit is designed to contain neutral or universally acceptable items that can be used regardless of the airline operating the flight. By doing so, flight attendants ensure that they are maintaining compliance with their own airline's service protocols while also delivering a consistent service experience to passengers.

Using the items from the Generic Service Kit allows flight attendants to avoid any potential issues related to the use of supplies that are not their airline's specific items, which may be a violation of brand standards or operational guidelines. It guarantees that they are following the correct procedures and adhering to safety and operational regulations.

Opting to ignore the supplies wouldn't resolve the situation and could lead to confusion or service discrepancies. Calling maintenance would not be necessary since the supplies can simply be replaced with those from the Generic Service Kit. Asking the lead flight attendant might be a step in the right direction, but the most efficient and straightforward solution is to use the appropriate items readily available in the Generic Service Kit.