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! Features: Packable and easily stashable when empty Lightweight at only 60g for a 1 liter bottle Top string near the cap for easy pull from side pockets Tethered cap Attaches to filters with a 28 mm thread, such as the Sawyer Squeeze, Mini, or Micro, the LifeStraw Flex, and the HydroBlu Versa Flow Robust and durable utilizing a thick 0.4mm TPU FDA approved and BPA, BPS, and BPF free Specs: Capacity: 1 liters Packed size: 4x2.9x2.9 inches Trail size: 10x2.9x2.9 inches Weight: 2.1 oz BPA, BPF, & BPS free Operational Temperatures: 20deg F to 212deg F