I hope this link works... Anyway, I was inspired by my robot building.
Two boxes, 90ish square feet of aluminum foil, and a roll and a half of duct tape. (I made shoulder straps for the inside so it'd be comfortable)
Let me know what you think...
I didn't design the eyes.. that was my g/f.
EDIT: Oh and I made the head hinge able. I mean I couldn't drink though the mouth whole. lol