Oh really? Well Apokalipse, I'll allow Google Images to convey my message:

[img]http://rlv.zcache.com/challenge_accepted_coffee_mugs-r12e8e0b682f74903be132338d15964d0_x7jgr_8byvr_324.jpg[/img]
(I literally just typed in "challenge accepted coffee", I was definitely not disappointed.)