AQUAPURE Traveller, £34.99,

Tourers and travellers will know how hard it can sometimes be to find clean water, but this simple water purification bottle does away with the need to carry a filter pump or cookware for boiling pan-loads of H2O. Approved by the Hospital of Tropical Diseases in London, the bottle’s cap has an ingenious built-in filter which eliminates viruses, bacteria, pathogens, solids and chemicals, as well as dirt and odours. Apparently it should work for 350-litres of refills before it needs replacing. We’ve used it extensively in Europe where livestock waste in rivers and streams was the main threat and suffered no ill effects. Fits all bottle-cages too. JK

PROS portable lifesaver
CONS none so far