Meanings of soda siphon in English

The secretary enters the office with a bottle of whiskey, a soda siphon and ice.

They're killing each other,' shrilled Margo, and seizing a soda siphon she proceeded to spray both guests and dogs with complete impartiality.

This morning the soda siphon (which had not been used for a couple of days) refused duty, owing to a plug of terra-cotta-coloured clay.

I wanted to ask Mr. Prendergast how he knew, but he said, "Your tray's slanting," and surged away to fetch Gregor a fresh soda siphon.