Studio friend David Chatting shared this experiment making his favourite Suffolk beer musical! By placing 3 pieces of aluminium tape on the side of the glass, the notes are triggered when the liquid nears the the foil. So when the beer is poured or the tilted, it changes the notes being triggered on the Ototo.
If you look closely you can see that there's a fourth wire connected to the bottom of the glass, this isn't connected to the touch keys but to the 'ground' (indicated by earthworm character!). This allows the Ototo to sense when the beer nears the foil - a handy tip for liquid experimenters out there!