Bringing food is prohibited on Korean buses.

<Things to keep in mind when taking buses in Korea>

Bringing food on board is prohibited when taking a bus in Korea. If you bring food, you may be given certain restrictions by the driver when you boarding. This is because food may cause harm to other guests.

If you have any other questions, please leave comments freely on this website. 

https://blogofkoreaprivate.blogspot.com/2024/04/website-can-ask-questions-korea.html

This blog is not an official website of the Korean government, but is operated in a private manner by a private organization.