Best hose to carry for general purpose & flushing tanks

I have a slinky-like self-coiling hose from Christmas Tree Shops that seems to work reasonably well. I can't speak to its long-term lasting power yet, but at something like $10 including a nozzle it's not exactly a high-ticket item to replace.

The claimed length is rather optimistic; I think it would only stretch that long if one were to uncoil it completely. It is long enough and works well for general odd jobs with the RV, at least so far for my needs.