I've bought a few of these - they don't wear out, I just have more than one clarinet. They're very stable, because of the four legs, and the fact that they put the clarinet bell very low to the floor.
They fold up easily, and are small and light to take with you. You could store it in the bell of your clarinet, in the case, if it's a Bb, though I'd probably want to put a thin cloth between them, or pack something under it, like cotton wool, so it couldn't move.
I'm using these stands for a Bb, two Cs and a small Eb clarinet. The bell of the Bb swallows the curved base of the stand, the Cs just about cover it, and the Eb sits on it, with a bit showing around the bell. They all fit it well, though.