Don't drink the water
A while ago I was offered the chance to test a new piece of walking gear, one that it was claimed would save me money, keep me safe and help save the planet, while still be small enough to carry in my rucksack. Well now I’ve had time to play with it I can at least confirm 3 of the 4 claims. The product in question is the Aqua Safe Filter Straw , a plastic tube not much thicker than an AA battery and just a bit longer than a DVD case. This light weight marvel can filter 500 litres of water, equivalent of 2,000 250mls bottles, saving loads of money on bottle water while on trips and saving the need to manufacture said bottle, there by cutting down on the estimated 100 grams of carbon gas is created with each bottle manufactured. Now I can confirm that it will save me money, one strew costs way less than 500 litres of bottled water, I can confirm it will keep me safe, I drank the water and am still here, and I can confirm it fits in the rucksack, a lot better than 500 litres of water ever...