Plushie | Super Mario | Stand Warp Pipe

In the Mario Bros. series, Warp Pipes are used to travel enemies around. Since Super Mario Bros., the main purpose of Warp Pipes is to transport Mario, Luigi, and other characters to another destination, reached from exiting the other end of the Warp Pipe. Some Warp Pipes cannot be re-entered from the other end. Warp Pipes are typically green, but they have also appeared in colors such as red or yellow.

The distance traveled through a Warp Pipe varies for each one. Some Warp Pipes take the user a long distance, including between worlds, and others do shorter distances. Some Warp Pipes only send the user straight underground, where there is usually one to take them above ground. A Warp Pipe usually faces in either of the four cardinal directions, and certain ones appear in midair.

(from Fandom Mario Wiki)