Since the water’s hot for my partner’s coffee, when I’m practicing going without caffeine I add a little lemon juice and ascorbic acid (vitamin C) powder to a cup of hot water, per Gandhi advice from a book he wrote in his 20s (?). It’s too hot and acidic to quaff, and while I still miss coffee with whole milk, this is a workable substitute that allows me to have wonderfully engaging dreams as part of a full-night’s sleep.