Water containers

[lakeside]

I have 5 litre rigid water container and use it to top up a 3 litre collapsible bottle with a tap. I sometimes get a water spill if I drive off without securing the tap bottle. I wonder if there a better set up out there without making some sort of frame to hold that bottle.

[notsofast]

Why not just get a larger collapsible tap bottle, such as one of these: https://www.camperlands.co.uk/collapsibl...r-15l.html  ?