With today being the holiday most popularly associated with eggs, there will be millions of people preparing devilled eggs as an appetiser. To save time add your cooked egg yolks and other ingredients into a plastic freezer bag, reseal and knead the yolks and ingredients together until you have a homogeneous mixture.
Now just cut the end of the bag and squeeze the filling into your egg whites. Instead of having to clean a spoon and a bowl and taking the time to individually fill each egg white half you just have one plastic freezer bag to throw away.
Easy Devilled Eggs [Reddit Life Pro Tips]