Currently I have hmmm let me think...I think I have 5 different pieces, but I've had 8 altogether.

I have currently
1 one hitter that looks like a cigarette
1 small opaque glass bowl that's green white and blue
1 medium glass bowl that's red
1 4 in bubbler that has blue swirls and is otherwise clear
1 steel smokeless piece

I usually have the small glass bowl and the smokeless piece lent out though since I don't really like them