No ice for me either. Even at home, when I drink from a can or bottle, I use a koozie or freezer mug.
I’ve seen those Yeti tumblers (very pricy!) and saw a review of a Yeti go tumbler on Youtube compared to other less expensive stainless steel tumblers and the Yeti keeps drinks hot or cold longer.
Heck, I sometimes don’t even mind drinking soda at room temperature.
Yeti, keeps hot things hot and cold things cold.
But how does it know?