Want to use nice new sunglasses more often than a fancy parlor room

I can't believe I'm using a question on this but please school me on something very basic, again. For the first time as an adult, I own sunglasses that did not come from the drugstore and cost $12. Not very expensive, but expensive enough, especially for me, if you know what I mean. (And medically necessary.) I'm too cheap to even want to think about having to replace these in the next few years. They came with a gigantic hardshell case perfect for travel. But what do people do when you take them off at a restaurant, party, store, planetarium, etc? I don't carry a purse. (The case I have is such a tank that it wouldn't fit well into my existing clutches and laptop bags, etc.) I don't wear button downs with front pockets I can dangle them out of like a boss (and my dad in the 70s and 80s). I don't want to not use them because I'm flummoxed about having to carry around this gigantic case, particularly with some upcoming travel in areas where I absolutely need to be wearing them.