The BernieHana Butter All-in-One is a highly potent show stopper with sweet flavours of ripe banana. The BernieHana Butter All-in-One is a highly potent show stopper with sweet flavours of ripe banana. This advanced All-in-One device was created by the innovators at 14TH ROUND, and precisely-tuned for the formulation of the BernieHana Butter oil to deliver an incredible vaping experience.