Character... Comics, Anime, Games This was a collaboration campaign between Attack on Titan and Asahi Soft Drinks' canned coffee, "Wonda Gold Black - Kin no Muto (Gold Sugar-Free)". When you purchased "Wonda Gold Black - Kin no Muto (Gold Sugar-Free)" at convenience stores nationwide, you received one "Attack on Titan 3-Way Strap" as a bonus for each can. The lineup included 10 types: Eren, Mikasa, Armin, Jean, Annie, Sasha, Christa, Reiner, Bertholdt, and Levi. I have stored them in a dark place since I purchased them.