Cnoc Vesica Collapsible Bottle, 1L with 28mm neck

From Campmor

The VesicaA(R) is a collapsible reusable and light water bottle that behaves like a hard bottle for easy drinking on the move. The Vesica carries 1 liter of water when full and stows away small while empty making it the ideal travel bottle. Simply tuck it in your pack or suitcase while not in use and expand when ready to fill We&';ve taken our experience from the Vecto and made a robust light and easy to use bottle so you can have a handy tool to stay hydrated. Featuring a collapsible body with a stiff neck and bottom the Vesica can stand when full with water or air held for drinking and collapsed when empty.