Warp Ring

From the Sonic News Network, the Sonic Wiki

A Warp Ring is a large ring-shaped object that can teleport anything that goes through it. It was seen in Sonic 3D Blast.

Warp Rings also appear in the Archie Comics continuity, in which they were created by Doctor Finitevus. The Warp Ring is essentially a portal resembling a Power Ring. It serves as instantaneous transport for anyone who uses it, and can seemingly penetrate any security measures and allow travel to any location, regardless of distance.