Venture Bros. Color-Changing Brock 16 oz. Glass Set of 2 Regular Brock or bloody Brock? These 16-ounce glasses change color! Featuring macho secret agent Brock Samson. Derived from Adult Swim's The Venture Bros. Regular Brock or bloody Brock? Add a cold beverage to one of these clear 16-ounce pint drinking glasses derived from Adult Swim's The Venture Bros. and the blood appears. The image of macho secret agent Brock Samson, knife in hand, magically changes color! As the glass warms up again, the image changes back to regular Brock. The The Venture Bros. logo on the back of the glass also changes from white to red and back again. How cool is that? Student of the great Hunter Gathers, former member of the OSI, and current member of SPHINX - Brock Samson is one bad dude. Trained to fight sharks, kill bears, and bed superspy ladies from all over the planet, there's no better baby sitter in the world. Seriously, that's a big part of his job!