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RayF
22220
Apr 14, 2018
I have these and paid a lot more--they're great, get 'em!
dkimlee
8
Apr 16, 2018
RayFDo they really keep coffee hot for a long time?
RayF
22220
Apr 17, 2018
dkimleeNot dramatically longer, but longer. Very good for drinks, like Irish Coffee, but I wouldn't recommend them as replacements for your everyday coffee cup.
Chaostrophy
44
Apr 17, 2018
dkimleeThe problem is that so much heat is lost through the surface, after all, heat rises. They are going to work better for cold drinks, frankly, but, at least you don't burn your hands. Reviews make me think they might be reasonably sturdy, most double wall stuff breaks very easily, with the only exception I've found to be the Sun's Tea line, which are as tough as any other glass (but, only straight wall, so, not so pretty).
imnotdan
14
Apr 17, 2018
ChaostrophyThat really depends on how you prep the cup for coffee. For coffee shops, and pro home brewers, it is necessary to preheat your vessel with boiling water. That way it keeps your cup from sucking all the heat from your drink. These cups are designed well for both hot and cold drinks, but from their titling and design I'd assume they're for hot drinks.
Chaostrophy
44
Apr 18, 2018
imnotdanWhile I do exactly what you talk about I suspect it doesn't matter, as the mass and specific heat the glass is trivial compared to the water. I should measure things and find out, but I suspect putting a sheet of plastic over the top will have more effect.
RayFRay says they’re good, so I really have no choice but to get in on this :)
RayF
22220
Jun 11, 2018
CarbonTacticsYour money cheerfully refunded if not completely delighted!