Eggs are often still good to eat long after the date on the packaging says to throw them out. If you want to test how fresh they are before finding out the hard way, here are a few methods for testing them. The Best Method for Uncracked Eggs: The Float Test. Just fill a bowl with cold water and place your eggs in the bowl. If they sink to the bottom and lay flat on their sides, they're very fresh. If they're a few weeks old but still good to eat, they'll stand on one end at the bottom of the bowl. If they float to the surface, they're no longer fresh enough to eat.