Although they aren't stretchy any more they still hold together and they come in a variety of colours: bright ones are easy to spot, darker may be easier to hide. Or they can match what you attach them to. You can attach them to any loop by putting it halfway through the loop, then pulling it through itself.
Replace a fallen-off or too small zipper pull, for example. Turn a very small loop on an article of clothing (for example the label in most bathing suits, or the label at the back of the neck of a jacket) that will only fit over a small metal hook into a larger loop that will hang over a small knob or the upright of a chair. Once you realize you have a pocket full of insta-handles or insta-loops, uses will come to you. While they may not save you buying anything, they will probably make the things you own more pleasant to use.