Drink Up Nalgene Proceeds help support the Partnership for a Healthier America and its Drink Up Initiative Made of BPA-free Eastman Tritan co-polyester with superior impact resistance; dishwasher safe on top rack Suitable for both warm and cold beverages (-40 to 212 degrees Fahrenheit); wide mouth makes cleaning and adding ice cubes easy Opening accommodates most water filters; marked with milliliters and ounces for easy measurement Made in the USA and guaranteed for the life of the product