the Rambler® 18 oz bottle is a necessary addition to your morning hikes, kayak trips and daily commutes. This tough bottle is double wall vacuum insulated to keep your water cold until the last sip, dishwasher safe for easy cleaning and comes standard with the chug cap. The shatter-resistant, dishwasher safe spout allows for controlled gulps on the go. When it's time for a wash or refill, remove the entire cap. Customize your bottle to really separate it from the pack.