Well, I figured it was time to switch over to a new drinking utensil, and ordered a set of Bodum Pavina (15-oz)
glasses last week. They're the new line of double-walled glass drinking utensils (think Thermos, but made from tempered borosilicate) from Bodum. So far, I am enjoying their use. I really do enjoy the ability to see what I'm drinking. (I am not affiliated with Bodum in any way)
Here it is in action, with some Adagio Gunpowder inside.
A note: a lot of people who have purchased these from a certain supplier named after a certain South-American river have compained about the fragility. I, however, find them to be perfectly normal. I drink enough tea to where I really have no reason to wash them in the dishwasher, and tea is all that I use them for. I don't mix anything into the tea, so I don't have to put spoons in there, and I don't drink iced tea, so I don't have to put ice cubes in there. Based on what I've read, I wouldn't recommend doing either of those things with these.
Anyway, just thought I'd share my opinion here in case anyone else wanted to try them for themselves.