Portal Themed Chainmaille Bracelet, Cuff & Choker by Links to the Past Links to the Past, a group of skilled craftspeople who make all kinds of chainmaille, have created a rad bracelet, cuff and choker themed after the Portal video game series by Valve. They are available for purchase from their online Etsy shop. They also have Team Fortress 2 RED and BLU team bracelets! via links-to-the-past