Nalgene bottles are very popular worldwide - and rightly so. The Everyday Wide Mouth Sustain series bottles are made from 50% certified recycled materials, which reduces the use of fossil fuels and lowers greenhouse gas emissions. The water bottle boasts excellent features: it is lightweight, durable, and taste-neutral, and it has a tightly sealing, large cap with a cap attachment (Loop-Top). The wide mouth makes it easy to clean and dishwasher safe. The opening is compatible with standard water filters from MSR and Katadyn. The Nalgene Sipper allows for easy reduction of the opening for drinking. Of course, the Everyday Wide Mouth Sustain is BPA/BPS-free.