The Starbucks logo is based on Melusine
http://symboldictionary.net/?p=1153Melusine is based on even older depictions of two tailed snake goddesses, and they're all depicted as demons. Echidna was one of the Greek legends and they're all evil
>In patriarchal times this goddess becomes the enemy, and is vilified and demonized, her very life giving shape as snake coming to epitomize evil. Far from being a source of life, she and her snake is inverted into a monstrous threat to life, when she is transformed into the demon or dragon of Greek and Hebrew accounts.https://www.gillianmealban.com/melusine-the-serpent-goddess-1/ 