If you love The Boulder Insulated Bottle, but the 20 oz. nor the 24 oz. is big enough- then this growler is for you! With space for 64 oz., you'll be set for the biggest adventures. The Boulder has been tested to keep water cold for up to 36 hours and hot up to 8 hours. Perfect for water, tea, coffee, soup or just about any drink. It has a wide mouth to easily accommodate ice cubes. The Boulder is a sturdy, high quality, stylish vacuum insulated steel water bottle for the office, tennis courts, golf course, on the trails... anyplace, anytime. Free of BPA, phthalates, & liners. Recyclable.