Teleportation Grenade

"How's the testing going?"

- Doc about the teleportation cubes

"Well Doc, after countless experiments, I've determined the teleportation cubes are still fucking awesome! All other data has been inconclusive."

- Grif in Reconciliation

The Teleportation Cubes, as named by Grif, is a type of grenade that was found on the UNSC Crashed Ship. They seem to have the ability to "store" items in subspace that are caught in its blast radius. Then these items can be released when another grenade is thrown, allowing them to "transport" any item easily.

Role in Plot
First appearing in Finders Keepers, many "teleportation cubes" were found by Grif while he, Sarge, and Doc were on the crashed ship. Not knowing what they do, he throws one cube at a pile of objects, which disappear before he throws another cube, which brings back the objects. Grif grows attach to them and, using the cubes abilities, takes all of them back to Red base. After Doc pleads him to experiment them and being threatened by Sarge, Grif begins to test the grenades to understand them more, but he doesn't learn anything as seen Reconciliation.

Trivia

 * Donut states that the teleporter grenades are similar to Pokeballs from the franchise Pokemon.
 * Unlike its name suggest, the teleportation cubes don't transport items, but instead store them inside what is likely subspace until they are released by another cube.