Somewhat similar to how dogs can recognise sound, our dog has a metal water bowl and she's learnt that picking it up with her mouth and throwing it to the floor

Somewhat similar to how dogs can recognise sound, our dog has a metal water bowl and she's learnt that picking it up with her mouth and throwing it to the floor creates a distinctive clanging sound. So now, whenever she wants water (even if it happens to be 3am), she'll throw her bowl across the room