At Tanga, buy one men's titanium ring for $8.99 and get a second for free via coupon code "TITANIUM". (You can mix-and-match.) With free shipping, that's $4.50/ring and the best per-unit price we've seen for titanium rings at Tanga. (For further comparison, in March we saw a single titanium ring for only $2 less.) Titanium rings are hypoallergenic, lightweight, and scratch-resistant. Deal ends November 13 at 3 am ET.