Attn Pop-up TC overlanders: gray water reinforced saddlebag?

....some interesting ideas. I looked at the 6" PVC tube scenario, but I don't want anything "permanent" mounted under this area.

Keep the ideas flowing...

I really like the fuel bladder technology, but am struggling to justify a ~7, 8 gallon bladder purchase at ~$280 +/-. These bladders sure are nice though.

I've own all kinds of water bladders (mostly clear flexible plastic) over my time (some as large as 8 liters), but none of them had an outlet I could connect an out-put tube to, like the sun shower design has.