This video offers evidence of cheating on the part of Danny Green and his team. [ame]http://www.youtube.com/watch?v=9pZujIVoX7E[/ame]
Mother****er loves his Lipton. They obviously were doing it in a very blatant manner. Not even trying to hide it. It was probably just tea.
Probably something like Red Bull, though it did look like Marquez's **** too. You're allowed to drink some other liquids, a few years ago I think Vargas or maybe Golden Boy signed a deal with Gatorade, they had an entire card where the fighters only drank gatorade between rounds.
I just had a quick skim through the boxing rules of the Western Australian Professional Combat Sports Commission (http://www.dsr.wa.gov.au/rule-books), and I can't find any indication which would permit anything other than water.