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Old 09-06-2019, 06:06 PM
SciFiSam is offline
Join Date: Mar 2003
Location: Beffnal Green innit
Posts: 8,503
Originally Posted by Grrr! View Post
I recently got this metal tumbler I've been gushing about to my coworkers.

Me; "Yeah it's great, I fill it up with iced tea before work, and by the end of the day it's still full of ice"

Coworkers: "Will it keep hot stuff hot too?"

There are thermos flasks that will keep stuff either hot or cold depending on how it started. I think some modern ones aren't made to withstain high temperatures, but a lot of older such cups did both.