Whenever you need a marker at ANY moment in your act, you reach out in your pocket and offer the spectator a Mini Sharpie... AS you uncap it, it INSTANTLY changes into a JUMBO sharpie!
This looks CRAZY and WILL GIVE reactions!
But there is more to do with Sharpee:
Visually morph the printing on the pen into: "Look Inside" and reveal a previously vanished SIGNED bill, card, silk etc. INSIDE the cap!
Sharpee is a GREAT comedy and magic prop all in one and will deliver some great laughter and amazement in your act.