Gurgling : onomat. Noise made by a liquid flowing in a pipe, out of a container, etc.
The gurgling of an empty bottle.
And glo, and glo : words repeated in chorus by guests when one of theirs is having a drink.
Song of the character Sganarelle in The doctor despite Himself, by the French actor and playwright Jean-Baptiste Poquelin, dit Molière (1622-1673):
How sweet they are
Pretty bottle,
How sweet they are
Your little gurgles;
But my fate would make many jealous,
If you were always full,
Ah! Bottle my dear,
Why are you emptying yourself?