Few of us plan to suck water from a murky pond through a small, blue straw. But if your water supply runs dry and your only other option is drinking straight from the pond, you’ll be happy you have this blue straw. It filters up to 1,000 gallons of contaminated water, requires no batteries and has no moving parts. It weighs 2 ounces and is only 9 inches long. We rarely plan to be without water, but all of us should.