ESEE Ferro Rod
A ferro rod is basically a souped-up flint, made with a mix of metals specifically designed to make as many sparks as possible with each strike. This is one of the pricier ferro rods you'll find, but the extra cost is worth it; with a built in compass and storage compartment, the ESEE Ferro Rod is an all-in-one tool that will make showers of sparks with every strike.
$35.18, www.amazon.com