BT21 minini TUMBLER EXPLORER (530ml)BT21 minini TUMBLER EXPLORER (530ml) Drop everything: this Mini tumbler just hit the shelves at Koolseoul. Crafted with attention to detail, this tumbler blends BT21's signature charm with practical everyday use. The Mini look adds extra personality without being over the top. BT21 has grown into one of the most beloved Kpop merch universes worldwide. Every product carries the spirit of BTS and the design craft of Line Friends. From Seoul to your