Here's what you'll need: two bowls, the egg and a water/pop bottle.
Crack the egg into the first bowl.
Gently squeeze the bottle...
...and place the rim of the bottle on the egg yolk.
Release the bottle, allowing the egg yolk to be sucked up into the bottle.
Squeeze the bottle again to drop the egg yolk into the second bowl for future use.
Make sure to use a bottle that you recently finished drinking from, as the bottle looses the suction over time.