I've been mixing my iced coffee with Premier Protein vanilla Protein shakes and some sugar free torani syrup. I'm still several months pre-op, but this gives me a delish flavored coffee and a protein boost.
I'm only a few months into my 6 month pre-op program - but what I have found for Protein shakes is using the Premier Protein vanilla premade shakes are really delicious if you add 1 TBSP of sugar free torani syrup. They have at least 20 sugar free flavors. I love the salted caramel, brown sugar, hazelnut.