The creamer and sugar are actually already added. And there are many different type of beverages ordered in local dialect. You can ask for a foam cup at some places, and some traditional coffee shops or coffee stalls at food centres still use empty cans for hot beverages. Maybe next time you visit, you can look out for these.

Just to share :

Coffee without sugar & creamer = Kopi Oh Kosong (Kosong is zero in malay, Oh = black in dialect)
Coffee Black (without creamer) = Kopi O
Coffee with creamer (without sugar) = Kopi Kosong
Coffee with condensed milk and sugar = Kopi See
Coffee with condensed milk but without sugar = Kopi See Kosong

Iced Coffee = Kopi Ping (ping = ice in dialect)

For tea, replace Kopi with Teh. ^_^