Sustainability in Your Hands: Our new Nalgene Sustain water bottles are made with material derived from 50% Plastic Waste (using ISCC certified mass balance).This material is powered by next generation recycling technology that transforms plastic into high performance BPA/BPS free bottles for everyday (and safe!) use. Leak-Proof Design: This Nalgene water bottle is completely leak proof, made of durable BPA-free Tritan, easy to clean and dishwasher safe on the top rack. For Your Everyday Adventures: Take your Nalgene bottle to the gym, office, camping, exploring and everywhere in between Great for Most Beverages: Suitable for both warm and cold beverages (-40 to 212 degrees Fahrenheit) Safe & Easy to Use: Free of BPA, BPS and phthalates, opening accommodates most water filters; marked with milliliters and ounces for easy measurement