It is no trouble at all if we do not need to write a Critique of Dialectical Reason to ground the cup of coffee. Or write its predecessor Being and Nothingness with its example of Pierre and the Café.
“Well think about this for a moment: for Sartre to have had a appointment with Pierre in the café, there had to have been Consciousness.”
“Well, there had to have been water and coffee also.”
And so it begins.