Is one allowed to use a serving spoon (without holes or slots) to drain off liquids from solids.
Straining Large Pieces of Fruit in a Drink. Using a Filter on a Sink Faucet;
How to Handle Confectionary Sugar When It Comes to Straining or Sifting;
Understanding the concept of "שכר שבת בהבלעה" (shabbos earnings included with weekday earnings).