I hadn’t seen anything like this before, known as a dual-flush toilet. Nice interface; the oval flush button is divided in two; one button is twice the size of the other. You choose which flushing button to press based on what you’ve just done. Visually there’s a number one and a number two button. They could have had some awkward fun with color-coding, I suppose. If it’s yellow…etc.
Note: other pics from our trip to Banff are here