The band's Kerplunk Kandy Grape Slurpee is available nationwide for a limited time Green Day is loving life at the moment! In an exclusive interview with PEOPLE at a launch party for the band’s new 7-Eleven Slurpee flavor,

Billie Joe Armstrong, Mike Dirnt and Tré Cool have been together since 1986, forming the punk band Green Day in Berkeley.

Elsewhere in his conversation with Variety, Armstrong reflected upon Green Day’s career. The punk group has come a long way from their early club days to their Grammy-winning multi-platinum triumphs. The singer noted that the biggest challenge came when they made the jump to a major label.