This is the NewRuleFX Rubber Comedy Frying Pan available on Amazon for a very worthwhile $48. It looks like a real frying pan but is made of rubber urethane foam and only weighs 8-ounces. Just make sure when you're going to prank your roommate you grab this pan instead of the real one or hey can you come over and bring a shower curtain and bleach?
Keep going for a few more shots of the realism.
Thanks to Luc, who agrees that's gonna smell really awesome when somebody turns the stove on underneath it.