Time Sphere

Time Spheres are transportable containment spheres used in time travel, in order to make the process easier.

History
Cisco Ramon created a Time Sphere for Eobard Thawne, who was to travel through a wormhole back to his own time. Ronnie Raymond noted that it included tungsten, known for both the highest melting point of all metals and for having flammable dust that could potentially melt a hole, causing an explosion. In order to prevent this, Thawne suggested that Cisco cement the tiles of the sphere with a cobalt resin to prevent degradation in cases of extreme heat. Despite its creation, Barry Allen torpedoed back through the wormhole, smashing the sphere and disabling Thawne from traveling through time.

Future
Rip Hunter was said to have made the first one, though due to time travel this was not the first.