Yeti's unique, 360-degree, 100% leak-proof HotShot cap lets you sip from any side while keeping the bottle's contents hot for hours on end. With a half twist and a click, you can sip from any side of your container. Twist it back and keep your favorite beverage hot or cold while eliminating spills. Fits all YETI Rambler bottles. Works great in bags and backpacks for a worry-free drink on the go.