An improvement on YETI's original "chug cap", this lid utilizes magnets to create an ingenious solution. The cap screws off and affixes to the magnet docking station located on the side of the lid. Never lose track of your cap while enjoying your beverage. The narrow spout of the chug cap allows for faster drinking while keeping ice cubes in their place - in the bottle. Fits on all YETI Rambler bottles.