One summer I worked in Montana on a temporary job, with a crew from various parts of the country. One fellow was from Louisiana and he brought his own coffee with him; it was something that apparently is only sold in south Louisiana (it did not contain chicory, btw). He drank it all day long, kept one of those mugs (that looks like an upside-down funnel) on the dash of his pickup....along with a bottle of Mylanta. He’d take a sip of coffee and a sip of mylanta all day long. One day he convinced me to try some of his coffee and that stuff was like battery acid. I can’t imagine how he had any lining left in his esophagus after drinking that foul brew.
Unrelated: I took up SanPelligrino Citrus Sparkling water cans a few weeks ago (trying to kick my Coke habit), and had my first 8oz Coke today, it felt like fire burning all the way down.
This from a 40-yr Coke drinker.