What should a Muslim employee do if they see alcoholic beverages in the possession of their foreign colleagues at work?

It is not permissible to sit at a table where alcohol is consumed, based on the Prophet's (peace be upon him) saying: "Whoever believes in Allah and the Last Day, let him not sit at a table where alcoholic beverages are circulated." If one's work necessitates being there, it is permissible to remain until one finds another job, provided that one avoids sitting with them while they are drinking alcohol. As for empty alcohol containers, if there is no liquid residue in them, there is no harm in touching them. However, if there is residue, then whatever it has touched must be washed, because alcohol is impure. It is permissible to purify the containers and use them, but it is better to dispose of them.