YETI Yonder Chug Cap Tether Accessory - A bottle is only as good as its cap, which is why we brought the best parts of our Rambler Chug Cap to the brand new Yonder Cap. 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. No more sloshing water all over your face and because it’s 100% leakproof, maps and socks stay dry in your bag.