Eggs: Store unwrapped truffles in a sealed container with eggs overnight. Eggs have a porous shell and will take on the aroma of the truffles.
Rice/Potatoes: Store unwrapped truffles in a sealed container with rice or potatoes for a few hours. They will take on the aroma of the truffles. Please refer to ‘MythBusters: Storing in rice’ for more information on rice.
You want to make sure that the truffles are sealed very well. Their strong aroma tends to permeate their surroundings quite easily. So if not properly sealed, you will have other items in your fridge that take on the truffle aroma-- as much as we love-infused eggs and potatoes, it does not taste well in milk when using it for cereal ;)