This is the classic Finnish Defence Forces canteen, 1 litre capacity with a rectangular space-efficient shape. Fits nicely in our Zipped or Lidded GP pouch 3x4 and side pouches of the Kahakka 15L and 25L packs. The screw-on cap is attached to the bottle to prevent accidental loss. Comes with a spring loaded steel hook for hanging. Overall a very sensible, functional and utterly proven water bottle. And yes, BPA-free as should be.