Golden Lasso

The Golden Lasso is an item which can be used to carry passive mobs as an item. This is done by right-clicking on the chosen mob, after which the mob will be stored inside the Lasso. To release the mob, right click on a block, where it will be placed down.

If you re-name the Lasso while it contains a mob, the mob will gain the new name, as if you had used a Name Tag.