The YETI Rambler Water Bottle - 36oz is a leakproof water bottle for long days away from a water source. Hydration is easy when the bottle is double-wall vacuum insulated to keep water cold. The chug cap features a wide mouth for filling with ice and water, and a smaller spout for fast and easy sipping. The 36-ounce size is a solid medium in the Rambler Water Bottle lineup, just right for adventures into the outdoors or a Monday full of classes.