Dyeing Mirror Box - Mini (FT)

Performer displays a small 4.5" cubical box. He opens the doors on the front and top of the box to show it is empty inside. A WHITE silk is now pushed through a hole on one side of the box. It emerges from a hole on the opposite side dyed a completely different color say RED. For a finale the magician opens the door on top again and proceeds to produce several silks of different colors.

Please supply your own silks.