On-Hand Hydration For Morning Hikes, Kayak Trips, And Daily Commutes. 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. Customise your bottle to really separate it from the pack. Please note: Do not use this Rambler® Bottle Cap with carbonated beverages, as storage for food or perishables, or to store boiling contents or with contents above 185°F/85°C.