SAWYER MINI WATER FILTRATION SYSTEM £35

The Sawyer Mini water filter is versatile, weighs just 65g and is guaranteed to filter 100,000 litres of water. Screw it to the top of the 16oz (455ml) pouch included or onto any standard water bottle to drink directly, use the removable straw to drink straight from the source, or connect it to your hydration bladder.

VERDICT Small, light and incredibly versatile, this stalwart removes 99.99999% of all bacteria, 99.9999% of all protozoa and 100% of microplastics.