: What you are describing is essentially the same as a bung or spigot, the
: design of which has long been used in sealing containers of liquid
: beverages.

: You could take the simple route of buying collapsible 2 to 5 gallon water
: containers and inflating them.

: Several table wines are available in boxes, the liners of which are easily
: recycled into use as flotation. I suggest you keep several handy at the
: launching of your new craft. Should you have any need of assistance in
: emptying such containers, send me an e-mail. I'm always happy to help
: kayak builders.

: to your health!

: Oh, chemical supply, and hospital supply firms have lots of designs for
: pinchcocks and hose clamps in metal and plastic. Certainly you can find
: some that will close your tubing easily and cheaply.

: PGJ

hey Paul

after a post that good we (or me for sure) are buying! May you never run dry!!

Some others in the same vein are sports water bottles or just store bought water bottles.

But what a nice group of ideas!

-mick