If you've been savoring your time outside these days by taking long walks and , the right gear will be sure to improve your experience, like a trusty water bottle to stay hydrated. Thankfully, collapsible water bottles have recently grown in popularity. They're generally made with lightweight, flexible materials like silicone that allow you to fold, flatten, or twist them down to become compact enough to fit easily into your bag (or even your pocket in some cases) and then expand again when it’s time to fill up.
