Maria Yablonina developed a system for wall-climbing robots to weave fibers into useful structures on vertical surfaces, like this hammock-like web that can support a human. The bots can even trade the threaded bobbin between units. Read the rest
My glasses are always a mess, and I am always scrounging around in my car or pockets for a cloth to clean them. This 18 pack of excellent micro fiber cleaning cloths will last me for months.
These are also just fine for cleaning camera lenses, my iPhone or laptop screens.
I will, however, lose them all and need to buy another. Luckily, they are pretty cheap.