From The TimeSplitters Wiki

Teleports are used mostly in Mapmaker. If you run into it, you teleport to the location of the correspondent teleport. They are a floating clouds that glow with diffrent colors.

Colors

• Red
• Blue
• Green
• Yellow
• Cyan

Other Info

• You must place two of the same color teleports to be able to teleport.
• It takes up only on tile space.
• Teleports can either work either way, or you can have one only send and the other only receive.