Anon10/06/25, 00:28No.16807362
tea drinker here, this is an easy oneThin walls are brittle and crack easily regardless of any temperature differential.
Thick walls are strong, and have higher heat capacitance. The thick walls suck up heat, hold onto it like a battery with all it's thermal mass. Then once the tea starts to get cold, the cup remains warm, heating it an and keeping the tea warmer longer.Of course you wanted to splurge you could go with double wall borosilicate mug or Dewar flask and ignore all that jazz.