The Yonder™ water bottles was strategically engineered to be both lightweight and shatter resistant, allowing you to haul essential hydration further and higher. Plus, Yeti's water bottle is made of durable and safe BPA-free material. But a bottle is only as good as its cap, which is why the 100% leakproof Yonder™ Tether Cap features an ultra-strong, always attached leash, so you can keep your bottle in one piece. Spin the top off when you need a drink from the controlled spout, twist off the bottom when you’re ready to refill or wash it.