BT21 HANDKERCHIEF K-TOKKIBT21 HANDKERCHIEF K TOKKI If cute, official and ARMY approved is your thing, this K Tokki collectible was made for you. This collectible features the playful K Tokki design that BT21 fans love, with the quality finish you'd expect from Line Friends. Whether you're flexing it daily or saving it as a collectible, it's built to last. BT21 is more than merch it's a cultural phenomenon connecting BTS fans across continents through cute, collectible art.