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Sifter
Cooking Utensil
A 'sifter' is mainly found in kitchens, not on construction sites or science labs. 
Fine Separation
A 'sifter' separates small from large particles, often in baking to aerate ingredients. 
Not for Liquids
Unlike a 'strainer,' a 'sifter' is used for dry ingredients, not to drain liquids. 