In normal conversation, just
The glass is still on the table.
After dinner, you could say
The glasses are still sitting on the table.
It would emphasize that they're still waiting to be washed, that no one has picked them up and brought them to the kitchen yet.
After an earthquake, you could say
Amid all the broken china and plaster, one glass was still standing, covered with debris, in the middle of the table.
That is, still intact and upright, not fallen over or broken.
But 'standing on the table' in general is not such a good choice, as the most normal sense is of a person on top of a table: 'What's he doing standing on that table with his shoes on?'
In a more literary description, or the setting for a scene in a play, you could write
The room is growing dark. A last ray of sunlight falls through the open window. The glass of whisky still stands on the table, untouched. The room is empty.