Simple tweezers to clean your glasses.
I hate the little piece of cloth falling out of the case or balling up, worse, smudging cleaned glasses when the it slips.
There are commercial tweezers but those are one-use, not very environmentally-friendly, I feel. With this you can use almost every inch of your cleaning cloth (they are inexpensive to replace anyway) on the same pair of tweezers.
You will need to cut your piece of cleaning cloth in half, follow the pictured instructions to coil it around each end, tuck it in the holder and voila!