The Nalgene TPE-Big Bore hydration system has a screw cap, so is not as easy to fill and clean as slider models, but has a detachable hose. Nalgene's TPE-Big Bore delivers taste-free water, has an excellent flow rate and reliable shut-off valve. Great build quality, especially for the price.
Contact: : 01629 580484, www.firstascent.co.uk
Verdict Slightly more fiddly to fill and clean than some, but exceptional performance and excellent value earns it top marks.
Reviewed by County Walking 2008.