These are the most durable ultralight tools I have found. They all fit on a keychain:
I’ve been reviewing water filters for about 16 years. One of the best filters I’ve found is the Aquagear Water Filter Pitcher (made in the USA). This filter has been certified by ISO 17025 accredited labs tests to remove lead (97.5%), fluoride (90%), chlorine (99.99%), chromium 6 (99.87%), mercury (99.6%), trihalomethanes (99.99%), DDT (98.8%).
Portable water filters have improved in recent years — manufacturers are now producing portable filters that can filter contaminant the size of nanometers (a billionth of a meter). Portable water filters have improved in recent years — manufacturers are now producing units that filter contaminants the size of nanometers (a billionth of a meter). I review the best portable water filters available today.
Ah titanium! It has the highest strength-to-weight ratio of any metal — approximately 40% stronger and 40% lighter than stainless steel. It’s also highly corrosion-resistant — even when exposed to sea water and chlorine. Oceanographers report that titanium immersed for 30 years in saltwater produces no measurable corrosion. This is because titanium forms a protective oxide film instantly, when …