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I noticed that there were 3 glasses shown and 4 graphs shown. I was wondering if a graph went with each glass and if the graph represented the shape of the glass or the liquor it could hold. I was also wondering why there were 4 graphs with only 3 glasses.

[...] teachers love noticing and wondering about math-y images like this: http://mathforum.org/blogs/pows/free-scenario-filling-glasses-wcydwt/ so get them doing it as a fun exercise, and then thinking about how it can help [...]

I wonder what crystalline imperfections give each glass their colors.

I wonder what exactly “height” refers to.

I wonder what shape glass the extraneous graph refers to.

I wonder if there’s any connection between the graphs and glasses at all?

I noticed that there are more height vs time graphs than there are glasses.

If height refers to the height of a fluid in a glass, then I noticed that each glass would then match to a height vs time graph.

I noticed the lines on the graphs are different colors.