Sustain BPA and BPS free Wide neck. The Nalgene Sustain bottle is made from 50% recycled material, making it a more eco-friendly choice for your hydration needs. It is BPA and BPS free, ensuring your water stays pure and free from harmful chemicals. The wide neck design makes it easy to fill, clean, and add ice cubes. Perfect for everyday use, outdoor adventures, and staying hydrated on the go.