Kind of like a giant Platypus. A cruiser just back from the 'hamas with some rigging issues I consulted with last week gave me one. He said they worked great, especially when he had to haul water to the boat. When empty, pack *very* small, and the price is very low, $7 per.
https://smartbottleinc.com/product/5-3-gallon/
Yep, great concept, had a similar 5 gallon for camping. It had molded in creases so that it collapse smoothly to flat. It had a recessed spigot near the bottom, and weighed a pound or so. The carry handle was about an inch in diameter, for comfortable carry. The fill hole was about 2 inches, and had a screw on cap, so easy to fill. Great engineering.
The price was right, my brother in law picked it up off the highway median, and gave it to me. It was empty when he found it, so no impact damage when it hit the ground off the pavement.
I think I still have one of those aboard. Very handy :)
I have 6 of these on the boat.
Easier to shuttle water in the dinghy than going thru the hassle of docking.
Looks much better then the ‘Coughlin’ flexible plastic water container. I had one of those self discharge all over my settee years ago…. Hauled around 4 5 gallon hard plastic jugs after that….