It's the fastest way to travel this side of the universe. Just give the Two-liter Transporter a quick turn, and the Trash Master or robot inside "disappears" behind a trick piece of silvery paper.
Use a craft knife to slice off the bottom 2-1/2 inches of a green 2-liter plastic bottle (a parent's job).
Cut a doorway. Now use clear tape to affix a rectangle of shiny paper to the inside wall of the transporter, opposite the doorway.
Tape a larger piece of the same paper to the bookcase wall behind the transporter.
For extra dazzle, stick junk mail CDs near the top of the wallpaper and to the floor beneath the transporter.