Given that 1) the coffee stays on top, away from the heat, 2) you boil water in them, which restricts the maximum temperature, and 3) they have rubber seals: un

Given that 1) the coffee stays on top, away from the heat, 2) you boil water in them, which restricts the maximum temperature, and 3) they have rubber seals: unless you're disassembling them and popping them into the oven frequently, I very much expect the answer is no. Just rancid. I will caveat this with "I am not a fan of moka pot coffee" though. I think it's usually awful. Better than, like, diner coffee, but still.