šolja

1. cup; mug
   Hoćeš li šolju čaja? — Would you like a cup of tea?
   Ujutru popijem dve šolje kafe. — In the morning I drink two cups of coffee.
2. colloq. (in a bathroom) toilet bowl
   Moramo da promenimo WC šolju. — We need to replace the toilet bowl.

The usual word for a cup in Serbia; a small coffee cup is šoljica.