Platypus bottles are cool collapsible water containers made in Seattle, WA by Cascade Design. They come in a range of sizes and styles from an on-the-go sized personal water bottle of .5 liter to a monster 6 liter ‘Platy Water Tank’ perfect for camping. All Platypus bottles collapse down to store flat, so once empty, there’s not the extra bulk of carrying an empty rigid bottle.
If you are the outdoors type that might go further than a water bottle will last you, they also have a filtration system to process stream water as you go. Or a Platypus designed just for wine!