[TonyBagODonuts]

"earliest use found in Alvin Toffler (1928–2016)."

So is it she coined the phrase as it applies to coffee?

[tlarkworthy]

if you read the article it explicitly states she herself says she borrowed the term from her reading of feminism. so yes.

[djpr]

There is "Third Wave Feminism", so likely not Toffler. Toffler used "Third Wave" to refer to the transition from an industrial society to an information society.