Nalgene's new Sustain bottles are made with 50% recycled content using plastic designed for landfills. They feel, look and perform the same as the Nalgene bottles we've come to love, but a little better for the planet. BPA/BPS free, leakproof (and no O-ring!), dishwasher safe, ultra durable and resistant to picking up taste or odour.They can withstand temperatures from -40°C to 100°C.