I bought one of these and you would need to be having almost luke warm coffee not to burn your hands . The glass is thin and even a slightly warm coffee makes it to hot to hold. I don't understand the other reviews that rate them so highly. If you like your coffee at mid temperatures these will not work. I reckon they are not fit for purpose at all. and spend your money elsewhere. When I called to discuss this they were not helpful at all and offered me nothing other than we haven't complaints from anyone else and we have passeed on your feedback.