The Nalgene Sustain Tritan BPA-Free On The Fly Water Bottle is designed for convenience and durability. Its slim shape and leak-proof cap make it ideal for work bags, gym bags, and backpacks, preventing spills. The bottle opens easily for one-handed refreshment on the go and locks securely to prevent leaks. Made from Nalgene's new Sustain material, which is derived from 50% recycled plastic waste (using ISCC certified mass balance), this bottle helps offset fossil fuel use and lower greenhouse gas emissions. It is free of BPA, BPS, and phthalates, and its opening accommodates most water filters. The bottle is marked with milliliters and ounces for easy measurement. Perfect for your everyday adventures, whether at the gym, office, camping, or exploring.