What should you do when a customer tries to consume an alcoholic beverage not supplied by SkyWest?

When a customer attempts to consume an alcoholic beverage that is not supplied by SkyWest, advising them that it's against federal regulations is the appropriate course of action. This response is grounded in compliance with laws and regulations governing the sale and consumption of alcohol on commercial flights.

Federal regulations prohibit the consumption of alcohol from sources other than the airline providing the service, primarily to ensure passenger safety and maintain legal responsibilities. By informing the customer of these regulations, you're not only adhering to company policy but also helping to foster a safe and compliant atmosphere onboard. This action supports both the airline's legal obligations and the overall safety of all passengers.

Other possible actions, like ignoring the situation could lead to escalation, encouraging the passenger to finish their drink quickly could create an unsafe environment, and confiscating the beverage might be unnecessary and escalate the situation negatively. Thus, educating the customer about the regulations is the most constructive and responsible approach.