There are at least 7 groups with the name H2O: 1) H2O is an American melodic hardcore/punk band from New York City that was formed in 1995 by Toby Morse, a former roadie for legendary hardcore act Sick of it All. They initially released their self-titled debut on Blackout Records before signing to punk powerhouse Epitaph Records for their breakout Thicker than Water. The band recently released their Bridge Nine debut Nothing to Prove, which was met by considerable fan and critic acclaim as a comeback of sorts.