I don't know much about this one. There are two main variations--pink and white. I'm not sure if the ones with differently colored glasses are edits or if they're "official" variants made by the original creator.

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Pink

Positive

Happy, laughing, excited, in love, etc.

Negative

Upset, scared, confused, apologetic, embarrassed, etc.

Neutral

Actions, hello/goodbye, holidays, and weather.

Website Navigation

Sports Fan Baseball Caps

I don't know why there are so many of these, but here they are!

Pairs

White

Positive

Happy, laughing, excited, in love, etc.

Negative

Upset, scared, confused, apologetic, embarrassed, etc.

Neutral

Actions, hello/goodbye, holidays, and weather.

Website Navigation

Pairs

Other