JIELUO Collapsible Water Bottles for Travel – 23oz Foldable Water Bottle with Leakproof Lid, Food-Grade Silicone Portable Reusable BPA-Free Water Bottle for Hiking,Sports,Camping,Biking(4 Pack)

["Portable & Collapsible Water Bottle: Our Water Bottle is equiped with carabiner, When the water bottle is empty, you can fold it up and easily put it in your backpack bag; it takes up almost no space. It's also very lightweight. When you fill it with water, the water bottle can stand on its own. You can use carabiner hook to attach it to your backpack without taking up space inside the backpack"]