Kion Coffee
KionOwns / invested in brandBrewed in a Wilfa Precision coffee maker in the morning; no coffee after noon.
Greenfield drinks his own company's coffee in the morning. He co-founded Kion, and Kion was also a sponsor of the episode, so this is a commercial tie.
Source: A Day In The Life Of Ben Greenfield: Ben's Exact Morning, Afternoon & Evening Routines (podcast, 19 Oct 2019)