Sesame Street was a right load of old cobblers. I only ever found one episode interesting, and that's because i had consumed a rather large dose of LSD before watching it (don't try this at home kids, its not big or clever)
I would only buy one if its a descent volume, the current mug that I use holds 600ml of liquid! A proper manly sized mug that is! 600ml of coffee in the morning sure helps to make things a little more clear and awake... :P
If the LFS mugs are those small little things then I shall pass