How To Sift Powdered Sugar Without A Sifter?

Sifting Dry Ingredients
The purpose of sifting is to break up any clumps which may be in your ingredients and to allow air to circulate throughout your ingredients. If you need a way to sift dry ingredients for a recipe and you do not have a sifter on hand, you can use a fork or egg whisk. Simply place your dry ingredients into a bowl and stir them with a fork or egg whisk. Stir thoroughly until your ingredients are smooth and light. This method of sifting will fluff up flour and powdered sugar quickly.

cooking.lifetips.com was looking for the same answer and this is what I found

Instead of a sifter I use a strainer.  It has a handle attached to a metal circle band.  Below it is a bowl shaped metal mesh.  Put the flour or powdered sugar into it plus any spices or other dry ingredients and tap the side of the band.  I first saw it used on TV.