Jeremy bought me this bottle for Christmas – the specs are here.
This is a really simple, lightweight, way to produce safe drinking water whilst I am backpacking or wild camping. No moving parts, batteries or pumps – drink straight from the bottle or use it to fill another water container or pot. When I wild camped in the Lakes last year I carried 3l or 3kg of water, my pack without the water weighed less than 9kgs – in the future I can top up along the way and save weight.