The first is Marvin Jenkins, except now he looks a little different with two mouthpeices coming out the side and a bowl ontop.

The red bong is named Elmo :P and I didn't have a chance to name the 4" pipe next to him before the inside of the bowl collapsed while my friend was cleaning it out Dx

The third I haven't named yet, my friend said bubbles but I decided that was completley unoriginal...