List three uses for a rubber band and one caveat for each.

1. Bundling cables and cords. Caveat: thin rubber degrades into sticky goo on hot electronics, and a band wrapped tight can crease a cable's insulation over time.
2. Keeping a jar lid shut in transit. Caveat: rubber bands slip off smooth plastic lids once condensation forms, and they snap unpredictably when stretched over a wide rim.
3. A makeshift grip on a slippery handle or pen. Caveat: it works only while dry — sweat or dishwater turns the band into a spinning ring rather than a grip.